Translates to HTTP 409 Conflict Error.

We return this on unexpected errors coming from the DB Layer.

We also return this from the Login, but after succesfully matching the credentials.

We return this on username or password mismatch on the Auth Service's Login.

This checks for gorm/mongo error types, not our custom ones.

Mimics errors.New, but allows for any type of message.

Returns a GRPC Status error with our custom ServiceErr inside.

JWT Generation.

JWT Validation.

DB Errors.

HTTP Errors.

We don't use %w as grpc.Status fmt.Sprints the error,.

so no error wrapping.

Our Service Errors must be GRPC 'Status' errors, as our Service speaks GRPC.