Synchronously invokes the <link linkend="gdbus-method-org-gnome-OnlineAccounts-Manager.
AddAccount">AddAccount</link> D-Bus method on this. The calling thread is blocked
until a reply is received.
See call_add_account for the asynchronous version of this method.
| this |
A ManagerProxy. |
| arg_provider |
Argument to pass with the method invocation. |
| arg_identity |
Argument to pass with the method invocation. |
| arg_presentation_identity |
Argument to pass with the method invocation. |
| arg_credentials |
Argument to pass with the method invocation. |
| arg_details |
Argument to pass with the method invocation. |
| out_account_object_path |
Return location for return parameter or null to ignore. |
| cancellable |
A Cancellable or null. |
|
true if the call succeeded, false if throws is set. |