trim whitespaces from the token before validation check

[mx-jhinz]

Sometimes users accidentally pass sanctum tokens in the request header with leading or trailing white-spaces (two white-spaces between the word "Bearer" and the token), like in:

curl  -H 'accept: application/json' -H "Authorization: Bearer  <token>" 
curl  -H 'accept: application/json' -H "Authorization: Bearer <token> " 

Currently, this results in an unexpected 401 with {"message":"Unauthenticated."} response from the application even though the token is correct. This can confuse the user. In this change tokens from the $request with leading or trailing white-spaces should be trimmed such that correct token are accepted and not denied.

[driesvints]

This is incorrect I feel. It's up to the sender to provide a correct bearer token.