Default region is defined in the authentication service

[EtienneM]

Related to Scalingo/authentication-service#261

[Soulou]

On a user with only one zone (osc-fr1)

[test1@soulou7 ~]$ scalingo apps
       Trying login with SSH…
 !     SSH connection failed.
       Trying login with user/password:

       Username or email: leo.unbek+testsignup@gmail.com
       Password: 
 !     Fail to login (1/3): fail to get Scalingo client from token tk-us-HyOz: fail to create Scalingo client: fail to get region '' specifications: invalid region 

[Soulou]

@EtienneM same error

[test1@soulou7 ~]$ scalingo apps
       Trying login with SSH…
 !     SSH connection failed.
       Trying login with user/password:

       Username or email: leo.unbek+testsignup@gmail.com
       Password: 
 !     Fail to login (1/3): fail to get Scalingo client from token tk-us-oQn5: fail to create Scalingo client: fail to get region '' specifications: invalid region 

       Username or email: ^Cinterrupt catched, aborting…
[test1@soulou7 ~]$ DEBUG=1 scalingo apps
       Trying login with SSH…
[DEBUG]2019/07/08 18:28:12 Login through SSH, identity: ssh-agent
 !     SSH connection failed.
       Trying login with user/password:

       Username or email: leo.unbek+testsignup@gmail.com
       Password: 
[DEBUG]2019/07/08 18:28:21 [API] POST https://auth.scalingo.com/v1/tokens
[DEBUG]2019/07/08 18:28:21       Headers: map[]
[DEBUG]2019/07/08 18:28:21       Params: map[token:{Scalingo CLI - soulou7}]
[DEBUG]2019/07/08 18:28:21       Request ID: 8d21aedc-07b9-405d-beac-d256f6002ba6
[DEBUG]2019/07/08 18:28:21       Duration: 319.999296ms
[DEBUG]2019/07/08 18:28:21 [Regions] Use the cache
 !     Fail to login (1/3): fail to get Scalingo client from token tk-us-e5Oy: fail to create Scalingo client: fail to get region '' specifications: invalid region