Checklist to resolve issues for multi tenancy

[rishabhpoddar]

• In sub domain based login (where each tenant has their own sub domain), during development, if you are passing in localhost:3000 as the tenantId (which can happen if you are reading from the domain from getTenantId function on the frontend), then the paths to the backend will be like /auth/localhost:3000/... which will prevent our routing from matching any path. To solve this, users must use either a domain alias, or then return a different tenant ID in case the domain is localhost:3000.
• The tenant that's currently trying to be used does not exist in the core
• License key has not been added to the core.
• If the third party provider array is not empty, and a tenant is loaded which has no providers configured for it, it will result in those providers being rendered which are specified in the providers array. So you should remove the providers array entirely.