Consult: administrator login after the background in the user management list key jump front and realize the user login

Before and after the project is the end of the separation, the login module using OAuth2, demand is now:
Administrator login backstage after the normal user list in the user management to a key to achieve the average user login front-end operation;
I.e., a key to jump to the front site, the ordinary users to log in state at the same time,

Consult how to implement?