public static CallCredentials bearerAuth(final String token) {
        return authorizationHeader(BEARER_AUTH_PREFIX + token);
    }
Creates new call credentials with the given token for bearer auth. Use this method if you have a permanent token
or only use the call credentials for a single call/while the token is valid.

<p>
<b>Note:</b> This method uses experimental grpc-java-API features.
</p>

@param token the bearer token to use
@return The newly created bearer auth credentials.
@see SecurityConstants#BEARER_AUTH_PREFIX
@see #authorizationHeader(String)
grpc-client-spring-boot-starter/src/main/java/net/devh/boot/grpc/client/security/CallCredentialsHelper.java