Enhancements on user creation

[mahalakshme]

Users uploaded on Avni should receive their credentials only after they complete their training on Glific. So the flow for this keeping in mind to minimise the errors is:

1. The data entry person will upload the user and catchment details as usual on Avni
2. But the above users will be in deactivated form and will not receive credentials - difference between current deactivated?
3. Once the users finish their training on Glific, Glific via web hook will call /activate on Avni during with users will get created on cognito and they will receive the credentials
4. The data entry person will monitor the webhook logs on a daily basis and for the failed calls will activate the users manually in Avni.

Tasks

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1. Creating users from UI always creates users with permanent password independent of the config avni-webapp#1376
   good first issue +1
   
2. POST /api/user avni-server#822
   +0
3. GET for users - all, by id avni-server#827
   +0
4. [Spike] Activate user avni-server#840
   +0