[BUG] Misleading error message when downloading SCB for name-colliding databases

[hemidactylus]

If one has more than one DB with the same name, running

astra db download-scb -f aaa.zip $DB

gives the error for the "Create database" operation, namely [ERROR] ALREADY_EXIST: Cannot create another Database with name 'workshops' Use flag --if-not-exist to connect to the existing database.

This message should be more accurate (and perhaps hint at the fact that you can specify a database by ID).

[clun]

Exception DatabaseNameNonUnique and DatabasenameAlreadyExist have been split to differentiate the situations.

astra db download-scb demo

Will get you a

[ERROR] CONFLICT: Multiple databases with same name 'demo' detected. 
Please fallback to database id to resolve the conflict

astra db create demo

Will get you a

[ERROR] ALREADY_EXIST: A database with name 'demo' already exists in the organization. 
To prevent conflicts CLI will not create another one, please change name