swagger access with bearer mode

the customer asks if it is possible to access on swagger not with 

oauth2 (OAuth2, authorizationCode)

but with 

BearerAuth  (http, Bearer)

is it possible? How do they have to fill in the field "Value"?

they want to permit to some specific user that are not created on SPP with any permissions to launch some specific method on swagger so they cannot give access through oauth2 and they would like to use that method, BearerAuth

thank you