AuthenticationContext.with_client_certificate cannot work with in-memory certificates

[rbubley]

AuthenticationContext.with_client_certificate reads in a certificate from a path (cert_path). This is fine if you have a filesystem, but is hard to use if you don't.

It would be good to be able to give the private_key as a string as an alternative to it being read from a file.

[vgrem]

Greetings,

in 2.3.15 version it is supported to pass private_key as a string:

cert_path = 'selfsigncert.pem'
with open(cert_path, 'r') as f:
      private_key = open(cert_path).read()

cert_credentials = {
     'tenant': test_tenant,
     'client_id': '--client id--',
     'thumbprint': '--thumbprint--',
     'private_key': private_key
}
ctx = ClientContext(test_team_site_url).with_client_certificate(**cert_credentials)