public static GrantedOAuth2AccessTokenBuilder builder(String accessToken) {
        return new GrantedOAuth2AccessTokenBuilder(accessToken);
    }
Creates a new {@link GrantedOAuth2AccessTokenBuilder} to build a new {@link GrantedOAuth2AccessToken} and
supplied it with a value of {@code access_token} Access Token response field.
@return A new instance of {@link GrantedOAuth2AccessTokenBuilder}.
oauth2/src/main/java/com/linecorp/armeria/common/auth/oauth2/GrantedOAuth2AccessToken.java