message: docs: fix custom oauth config
diff: @@ -134,7 +134,7 @@ OAUTH_PROVIDERS = [
  'access_token_headers':{ # Additional headers for calls to access_token_url
  'Authorization': 'Basic Base64EncodedClientIdAndSecret'
  },
  - 'base_url':'https://myAuthorizationServer/oauth2AuthorizationServer/',
  + 'api_base_url':'https://myAuthorizationServer/oauth2AuthorizationServer/',
  'access_token_url':'https://myAuthorizationServer/oauth2AuthorizationServer/token',
  'authorize_url':'https://myAuthorizationServer/oauth2AuthorizationServer/authorize'
  }
  