Add CertificateIdentityProvider to imports #120

Job	Run time
Test on python 3.7 and ubuntu-latest	3m 8s
Test on python 3.7 and windows-latest	3m 38s
Test on python 3.7 and macos-latest	21s
Test on python 3.8 and ubuntu-latest	2m 18s
Test on python 3.8 and windows-latest	3m 28s
Test on python 3.8 and macos-latest	30s
Test on python 3.9 and ubuntu-latest	2m 17s
Test on python 3.9 and windows-latest	2m 57s
Test on python 3.9 and macos-latest	22s
Test on python 3.10 and ubuntu-latest	2m 31s
Test on python 3.10 and windows-latest	2m 24s
Test on python 3.10 and macos-latest	18s
Test on python 3.11 and ubuntu-latest	1m 41s
Test on python 3.11 and windows-latest	3m 16s
Test on python 3.11 and macos-latest	18s
	29m 27s

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