Before log in with mai, we can list which profiles we have:
$ ./venv-py3.4/bin/mai list                                                                                                                                                                                  
Name             │Role                                                             │Url                     │User                      
profileName1    AWS Account 288593816804 (acme-team2): AWS-Profile-Name     https://aws.acme.net joe@acme.net
ok, now I know I want to log in into the profileName1 profile:
$ ./venv-py3.4/bin ...