public Builder setCustomParam()

in auth-lib/src/main/java/com/spotify/sdk/android/auth/AuthorizationRequest.java [110:119]


        public Builder setCustomParam(String key, String value) {
            if (key == null || key.isEmpty()) {
                throw new IllegalArgumentException("Custom parameter key can't be null or empty");
            }
            if (value == null || value.isEmpty()) {
                throw new IllegalArgumentException("Custom parameter value can't be null or empty");
            }
            mCustomParams.put(key, value);
            return this;
        }