diff --git a/client/src/api/index.ts b/client/src/api/index.ts
index b27d9746a0f3..e22be0702139 100644
--- a/client/src/api/index.ts
+++ b/client/src/api/index.ts
@@ -215,36 +215,32 @@ export function isHistoryItem(item: object): item is HistoryItemSummary {
     return item && "history_content_type" in item;
 }
 
-type QuotaUsageResponse = components["schemas"]["UserQuotaUsage"];
+type RegisteredUserModel = components["schemas"]["DetailedUserModel"];
+type AnonymousUserModel = components["schemas"]["AnonUserModel"];
 
-/** Represents a registered user.**/
-export interface User extends QuotaUsageResponse {
-    id: string;
-    email: string;
-    tags_used: string[];
+export interface RegisteredUser extends RegisteredUserModel {
     isAnonymous: false;
-    is_admin?: boolean;
-    username?: string;
 }
 
-export interface AnonymousUser extends QuotaUsageResponse {
-    id?: string;
+export interface AnonymousUser extends AnonymousUserModel {
     isAnonymous: true;
-    is_admin?: false;
-    username?: string;
 }
 
-export type GenericUser = User | AnonymousUser;
+export type GenericUser = RegisteredUser | AnonymousUser;
 
 /** Represents any user, including anonymous users or session-less (null) users.**/
 export type AnyUser = GenericUser | null;
 
-export function isRegisteredUser(user: AnyUser): user is User {
-    return user !== null && !user?.isAnonymous;
+export function isRegisteredUser(user: AnyUser): user is RegisteredUser {
+    return user !== null && "email" in user;
 }
 
 export function isAnonymousUser(user: AnyUser): user is AnonymousUser {
-    return user !== null && user.isAnonymous;
+    return user !== null && !isRegisteredUser(user);
+}
+
+export function isAdminUser(user: AnyUser): user is RegisteredUser {
+    return isRegisteredUser(user) && user.is_admin;
 }
 
 export function userOwnsHistory(user: AnyUser, history: AnyHistory) {
diff --git a/client/src/api/workflows.ts b/client/src/api/workflows.ts
index 4d676cefcc94..af3fbd325502 100644
--- a/client/src/api/workflows.ts
+++ b/client/src/api/workflows.ts
@@ -9,3 +9,16 @@ export const invocationCountsFetcher = fetcher.path("/api/workflows/{workflow_id
 
 export const sharing = fetcher.path("/api/workflows/{workflow_id}/sharing").method("get").create();
 export const enableLink = fetcher.path("/api/workflows/{workflow_id}/enable_link_access").method("put").create();
+
+//TODO: replace with generated schema model when available
+export interface WorkflowSummary {
+    name: string;
+    owner: string;
+    [key: string]: unknown;
+    update_time: string;
+    license?: string;
+    tags?: string[];
+    creator?: {
+        [key: string]: unknown;
+    }[];
+}
diff --git a/client/src/components/Masthead/QuotaMeter.vue b/client/src/components/Masthead/QuotaMeter.vue
index fe6ad9e1fcff..5d3dc01ae72b 100644
--- a/client/src/components/Masthead/QuotaMeter.vue
+++ b/client/src/components/Masthead/QuotaMeter.vue
@@ -3,6 +3,7 @@ import { BLink, BProgress, BProgressBar } from "bootstrap-vue";
 import { storeToRefs } from "pinia";
 import { computed } from "vue";
 
+import { isRegisteredUser } from "@/api";
 import { useConfig } from "@/composables/config";
 import { useUserStore } from "@/stores/userStore";
 import { bytesToString } from "@/utils/utils";
@@ -10,13 +11,13 @@ import { bytesToString } from "@/utils/utils";
 const { config } = useConfig();
 const { currentUser, isAnonymous } = storeToRefs(useUserStore());
 
-const hasQuota = computed(() => {
+const hasQuota = computed<boolean>(() => {
     const quotasEnabled = config.value.enable_quotas ?? false;
-    const quotaLimited = currentUser.value?.quota !== "unlimited" ?? false;
+    const quotaLimited = (isRegisteredUser(currentUser.value) && currentUser.value.quota !== "unlimited") ?? false;
     return quotasEnabled && quotaLimited;
 });
 
-const quotaLimit = computed(() => currentUser.value?.quota ?? 0);
+const quotaLimit = computed(() => (isRegisteredUser(currentUser.value) && currentUser.value.quota) ?? null);
 
 const totalUsageString = computed(() => {
     const total = currentUser.value?.total_disk_usage ?? 0;
@@ -56,7 +57,7 @@ const variant = computed(() => {
                 <span v-localize>Using</span>
                 <span v-if="hasQuota">
                     <span>{{ usage.toFixed(0) }}%</span>
-                    <span v-if="quotaLimit !== 0">of {{ quotaLimit }}</span>
+                    <span v-if="quotaLimit !== null">of {{ quotaLimit }}</span>
                 </span>
                 <span v-else>{{ totalUsageString }}</span>
             </span>
diff --git a/client/src/components/Workflow/List/WorkflowActions.vue b/client/src/components/Workflow/List/WorkflowActions.vue
index a6acda9a75f6..91c5524c1ac4 100644
--- a/client/src/components/Workflow/List/WorkflowActions.vue
+++ b/client/src/components/Workflow/List/WorkflowActions.vue
@@ -44,12 +44,9 @@ const { confirm } = useConfirmDialog();
 const bookmarkLoading = ref(false);
 
 const shared = computed(() => {
-    if (userStore.currentUser) {
-        return userStore.currentUser.username !== props.workflow.owner;
-    } else {
-        return false;
-    }
+    return !userStore.matchesCurrentUsername(props.workflow.owner);
 });
+
 const sourceType = computed(() => {
     if (props.workflow.source_metadata?.url) {
         return "url";
diff --git a/client/src/components/Workflow/List/WorkflowActionsExtend.vue b/client/src/components/Workflow/List/WorkflowActionsExtend.vue
index 6968cc745ef7..ae5878a44e7f 100644
--- a/client/src/components/Workflow/List/WorkflowActionsExtend.vue
+++ b/client/src/components/Workflow/List/WorkflowActionsExtend.vue
@@ -36,12 +36,9 @@ const { isAnonymous } = storeToRefs(useUserStore());
 const downloadUrl = computed(() => {
     return withPrefix(`/api/workflows/${props.workflow.id}/download?format=json-download`);
 });
+
 const shared = computed(() => {
-    if (userStore.currentUser) {
-        return userStore.currentUser.username !== props.workflow.owner;
-    } else {
-        return false;
-    }
+    return !userStore.matchesCurrentUsername(props.workflow.owner);
 });
 
 async function onCopy() {
diff --git a/client/src/components/Workflow/List/WorkflowCard.vue b/client/src/components/Workflow/List/WorkflowCard.vue
index 076ec2c271e6..f217a1a76ec2 100644
--- a/client/src/components/Workflow/List/WorkflowCard.vue
+++ b/client/src/components/Workflow/List/WorkflowCard.vue
@@ -48,13 +48,11 @@ const showRename = ref(false);
 const showPreview = ref(false);
 
 const workflow = computed(() => props.workflow);
+
 const shared = computed(() => {
-    if (userStore.currentUser) {
-        return userStore.currentUser.username !== workflow.value.owner;
-    } else {
-        return false;
-    }
+    return !userStore.matchesCurrentUsername(workflow.value.owner);
 });
+
 const description = computed(() => {
     if (workflow.value.annotations && workflow.value.annotations.length > 0) {
         return workflow.value.annotations[0].trim();
diff --git a/client/src/components/Workflow/List/WorkflowIndicators.vue b/client/src/components/Workflow/List/WorkflowIndicators.vue
index 676e56932a03..92ccac96c4ae 100644
--- a/client/src/components/Workflow/List/WorkflowIndicators.vue
+++ b/client/src/components/Workflow/List/WorkflowIndicators.vue
@@ -29,19 +29,17 @@ const router = useRouter();
 const userStore = useUserStore();
 
 const publishedTitle = computed(() => {
-    if (userStore.currentUser?.username === props.workflow.owner) {
+    if (userStore.matchesCurrentUsername(props.workflow.owner)) {
         return "Published by you. Click to view all published workflows by you";
     } else {
         return `Published by '${props.workflow.owner}'. Click to view all published workflows by '${props.workflow.owner}'`;
     }
 });
+
 const shared = computed(() => {
-    if (userStore.currentUser) {
-        return userStore.currentUser.username !== props.workflow.owner;
-    } else {
-        return false;
-    }
+    return !userStore.matchesCurrentUsername(props.workflow.owner);
 });
+
 const sourceType = computed(() => {
     if (props.workflow.source_metadata?.url) {
         return "url";
@@ -51,6 +49,7 @@ const sourceType = computed(() => {
         return "";
     }
 });
+
 const sourceTitle = computed(() => {
     if (sourceType.value.includes("trs")) {
         return `Imported from TRS ID (version: ${props.workflow.source_metadata.trs_version_id}). Click to copy ID`;
diff --git a/client/src/components/Workflow/List/WorkflowList.vue b/client/src/components/Workflow/List/WorkflowList.vue
index b730a12f002c..70467677c548 100644
--- a/client/src/components/Workflow/List/WorkflowList.vue
+++ b/client/src/components/Workflow/List/WorkflowList.vue
@@ -145,7 +145,7 @@ async function load(overlayLoading = false, silent = false) {
             : data;
 
         if (props.activeList === "my") {
-            filteredWorkflows = filter(filteredWorkflows, (w: any) => w.owner === userStore.currentUser?.username);
+            filteredWorkflows = filter(filteredWorkflows, (w: any) => userStore.matchesCurrentUsername(w.owner));
         }
 
         workflowsLoaded.value = filteredWorkflows;
diff --git a/client/src/components/Workflow/Published/WorkflowInformation.vue b/client/src/components/Workflow/Published/WorkflowInformation.vue
index b9d9afb1acb5..dc41bdd27c85 100644
--- a/client/src/components/Workflow/Published/WorkflowInformation.vue
+++ b/client/src/components/Workflow/Published/WorkflowInformation.vue
@@ -5,6 +5,7 @@ import { FontAwesomeIcon } from "@fortawesome/vue-fontawesome";
 import { computed } from "vue";
 import { RouterLink } from "vue-router";
 
+import { type WorkflowSummary } from "@/api/workflows";
 import { useUserStore } from "@/stores/userStore";
 import { getFullAppUrl } from "@/utils/utils";
 
@@ -16,19 +17,8 @@ import UtcDate from "@/components/UtcDate.vue";
 
 library.add(faBuilding, faUser);
 
-interface WorkflowInformation {
-    name: string;
-    [key: string]: unknown;
-    update_time: string;
-    license?: string;
-    tags?: string[];
-    creator?: {
-        [key: string]: unknown;
-    }[];
-}
-
 interface Props {
-    workflowInfo: WorkflowInformation;
+    workflowInfo: WorkflowSummary;
     embedded?: boolean;
 }
 
@@ -51,11 +41,7 @@ const fullLink = computed(() => {
 });
 
 const userOwned = computed(() => {
-    if (userStore.currentUser) {
-        return userStore.currentUser.username === props.workflowInfo.owner;
-    } else {
-        return false;
-    }
+    return userStore.matchesCurrentUsername(props.workflowInfo.owner);
 });
 </script>
 
diff --git a/client/src/components/Workflow/Published/WorkflowPublished.vue b/client/src/components/Workflow/Published/WorkflowPublished.vue
index d2c14b7d18b3..524623314ab7 100644
--- a/client/src/components/Workflow/Published/WorkflowPublished.vue
+++ b/client/src/components/Workflow/Published/WorkflowPublished.vue
@@ -6,6 +6,7 @@ import { type AxiosError } from "axios";
 import { BAlert, BButton, BCard } from "bootstrap-vue";
 import { computed, onMounted, ref, watch } from "vue";
 
+import { type WorkflowSummary } from "@/api/workflows";
 import { fromSimple } from "@/components/Workflow/Editor/modules/model";
 import { getWorkflowFull, getWorkflowInfo } from "@/components/Workflow/workflows.services";
 import { useDatatypesMapper } from "@/composables/datatypesMapper";
@@ -22,14 +23,6 @@ import WorkflowInformation from "@/components/Workflow/Published/WorkflowInforma
 
 library.add(faBuilding, faDownload, faEdit, faPlay, faSpinner, faUser);
 
-type WorkflowInfo = {
-    name: string;
-    [key: string]: unknown;
-    license?: string;
-    tags?: string[];
-    update_time: string;
-};
-
 interface Props {
     id: string;
     zoom?: number;
@@ -65,7 +58,7 @@ const { stateStore } = provideScopedWorkflowStores(props.id);
 
 const loading = ref(true);
 const errorMessage = ref("");
-const workflowInfo = ref<WorkflowInfo>();
+const workflowInfo = ref<WorkflowSummary>();
 const workflow = ref<Workflow | null>(null);
 
 const hasError = computed(() => !!errorMessage.value);
@@ -80,13 +73,11 @@ const initialPosition = computed(() => ({
 }));
 
 const viewUrl = computed(() => withPrefix(`/published/workflow?id=${props.id}`));
+
 const sharedWorkflow = computed(() => {
-    if (userStore.currentUser) {
-        return userStore.currentUser.username !== workflowInfo.value?.owner;
-    } else {
-        return false;
-    }
+    return !userStore.matchesCurrentUsername(workflowInfo.value?.owner);
 });
+
 const editButtonTitle = computed(() => {
     if (userStore.isAnonymous) {
         return "Log in to edit Workflow";
diff --git a/client/src/components/Workflow/Run/WorkflowRun.vue b/client/src/components/Workflow/Run/WorkflowRun.vue
index 5f3a97e7dad0..4190257e3cdd 100644
--- a/client/src/components/Workflow/Run/WorkflowRun.vue
+++ b/client/src/components/Workflow/Run/WorkflowRun.vue
@@ -1,6 +1,5 @@
 <script setup lang="ts">
 import { BAlert, BLink } from "bootstrap-vue";
-import { storeToRefs } from "pinia";
 import { computed, onMounted, ref, watch } from "vue";
 import { RouterLink } from "vue-router";
 import { useRouter } from "vue-router/composables";
@@ -22,7 +21,7 @@ import WorkflowRunSuccess from "@/components/Workflow/Run/WorkflowRunSuccess.vue
 
 const historyStore = useHistoryStore();
 const historyItemsStore = useHistoryItemsStore();
-const { currentUser } = storeToRefs(useUserStore());
+const userStore = useUserStore();
 const router = useRouter();
 
 interface Props {
@@ -55,7 +54,7 @@ const editorLink = computed(
     () => `/workflows/edit?id=${props.workflowId}${props.version ? `&version=${props.version}` : ""}`
 );
 const historyStatusKey = computed(() => `${currentHistoryId.value}_${lastUpdateTime.value}`);
-const isOwner = computed(() => currentUser.value?.username === workflowModel.value.runData.owner);
+const isOwner = computed(() => userStore.matchesCurrentUsername(workflowModel.value.runData.owner));
 const lastUpdateTime = computed(() => historyItemsStore.lastUpdateTime);
 const canRunOnHistory = computed(() => {
     if (!currentHistoryId.value) {
diff --git a/client/src/components/Workflow/workflows.services.ts b/client/src/components/Workflow/workflows.services.ts
index e0c9c7d328c9..ade0f1f1b40d 100644
--- a/client/src/components/Workflow/workflows.services.ts
+++ b/client/src/components/Workflow/workflows.services.ts
@@ -53,9 +53,9 @@ export async function copyWorkflow(id: string, currentOwner: string, version?: s
     const { data: workflowData } = await axios.get(withPrefix(path));
 
     workflowData.name = `Copy of ${workflowData.name}`;
-    const currentUsername = useUserStore().currentUser?.username;
+    const userStore = useUserStore();
 
-    if (currentUsername !== currentOwner) {
+    if (!userStore.matchesCurrentUsername(currentOwner)) {
         workflowData.name += ` shared by user ${currentOwner}`;
     }
 
diff --git a/client/src/stores/userStore.ts b/client/src/stores/userStore.ts
index 9e53f5f111ac..ffd44c5f76a9 100644
--- a/client/src/stores/userStore.ts
+++ b/client/src/stores/userStore.ts
@@ -1,7 +1,7 @@
 import { defineStore } from "pinia";
 import { computed, ref } from "vue";
 
-import { type AnonymousUser, type User } from "@/api";
+import { type AnyUser, isAdminUser, isAnonymousUser, isRegisteredUser, type RegisteredUser } from "@/api";
 import { useUserLocalStorage } from "@/composables/userLocalStorage";
 import { useHistoryStore } from "@/stores/historyStore";
 import {
@@ -19,7 +19,7 @@ interface Preferences {
 type ListViewMode = "grid" | "list";
 
 export const useUserStore = defineStore("userStore", () => {
-    const currentUser = ref<User | AnonymousUser | null>(null);
+    const currentUser = ref<AnyUser>(null);
     const currentPreferences = ref<Preferences | null>(null);
 
     // explicitly pass current User, because userStore might not exist yet
@@ -35,11 +35,11 @@ export const useUserStore = defineStore("userStore", () => {
     }
 
     const isAdmin = computed(() => {
-        return currentUser.value?.is_admin ?? false;
+        return isAdminUser(currentUser.value);
     });
 
     const isAnonymous = computed(() => {
-        return !("email" in (currentUser.value || []));
+        return isAnonymousUser(currentUser.value);
     });
 
     const currentTheme = computed(() => {
@@ -54,7 +54,11 @@ export const useUserStore = defineStore("userStore", () => {
         }
     });
 
-    function setCurrentUser(user: User) {
+    function matchesCurrentUsername(username?: string) {
+        return isRegisteredUser(currentUser.value) && currentUser.value.username === username;
+    }
+
+    function setCurrentUser(user: RegisteredUser) {
         currentUser.value = user;
     }
 
@@ -132,6 +136,7 @@ export const useUserStore = defineStore("userStore", () => {
         toggledSideBar,
         preferredListViewMode,
         loadUser,
+        matchesCurrentUsername,
         setCurrentUser,
         setCurrentTheme,
         setPreferredListViewMode,