Description 📣

Closes #939
After the current logged in user is checked in the login Cmd,

• config.INFISICAL_URL is the current logged in user's domain url
• config.INFISICAL_URL_MANUAL_OVERRIDE is the value of the manual override set from --domain or the INFISICAL_API_URL env variable
• We check if the domain flag was set or the env variable exists, if yes, we respect the manual override
• If not we assume config.INFISICAL_URL is the default api url then prompt for a domain override ( necessary? )