Only a release manager can add a source control access, where in the source control can be GitLab or Bitbucket. With this privilege, a release manager can select the GitLab type, Bitbucket and enter the gitLab server name. You can supply multiple server names and then use the git lab personal access token and assign it to the source control server.
By enabling access source control, you can add an endpoint for a source control. For information on adding a source control, see Add a Source Control Server Endpoint. Release manager can add a source control server. But any developer logged-in to vRealize Suite Lifecycle Manager has to associate their token to the server to access the source control server.