BitBucket
- Add a new OAuth consumer
- In "Callback URL" use 
https://<oauth2-proxy>/oauth2/callback, substituting<oauth2-proxy>with the actual hostname that oauth2-proxy is running on. - In Permissions section select:
- Account -> Email
 - Team membership -> Read
 - Repositories -> Read
 
 
 - In "Callback URL" use 
 - Note the Client ID and Client Secret.
 
To use the provider, pass the following options:
   --provider=bitbucket
   --client-id=<Client ID>
   --client-secret=<Client Secret>
The default configuration allows everyone with Bitbucket account to authenticate. To restrict the access to the team
members use additional configuration option: --bitbucket-team=<Team name>. To restrict the access to only these users
who have access to one selected repository use --bitbucket-repository=<Repository name>.