v1.21.0

Added

• Add a new function loginAs. The function takes a single parameter, code,
  which is the authorization code to use. This function should be used to do
  "Login As" instead of using login function with code.
  #196
• Add a new key isLoggedInAs to the return value of the authInfo. The value
  is boolean where true indicates that "Login As" was used. Applications
  should use this value to check if "Login As" was used instead of examining the
  token scopes. #196
• Add a new configuration option disableDeprecationWarnings
  #196

Deprecated

• Using the login function to do "Login As", i.e. logging in with code
  instead of username and password is deprecated in favor of a newly added
  loginAs function. #196