returns the verb for the request token endpoint defaults to post concode_field_sep PlaceHolder placeHolder concode_field_sep TimestampService getTimestampService concode_elem_sep AccessTokenExtractor getAccessTokenExtractor concode_elem_sep String getAccessTokenEndpoint concode_elem_sep OAuthService createService concode_elem_sep String getAuthorizationUrl concode_elem_sep SignatureService getSignatureService concode_elem_sep BaseStringExtractor getBaseStringExtractor concode_elem_sep Verb getAccessTokenVerb concode_elem_sep String getRequestTokenEndpoint concode_elem_sep RequestTokenExtractor getRequestTokenExtractor concode_elem_sep HeaderExtractor getHeaderExtractor