Use a different name for the token in the header

[tim-x-y-z]

Would it be possible to overwrite the name of the token that is expected in the authorization header? i.e look for the token in authorization with the value Token xxx-secret

in particular, i think it might be derived from oauth2 instead of the bearer impl. from fastapi. https://github.com/tiangolo/fastapi/blob/eef1b7d51530be64ddd48e02b5ca46f28a0ebfc1/fastapi/security/oauth2.py#L391

happy to submit a pr if that sounds good.