Add authentication wrapper

Author: nioc

lib/index.js

@@ -73,6 +73,26 @@ class NetatmoClient {
     this.expiresInTimestamp = 0
   }
 
+  /**
+   * Authenticate with access token, refresh token or client credentials
+   *
+   * @param {string} accessToken Access token for your user
+   * @param {string} refreshToken Refresh token to get a new access token
+   * @param {number} expiresInTimestamp Validity timelaps as timestamp
+   * @param {string} username User address email
+   * @param {string} password User password
+   * @return {Token} Token `{accessToken, refreshToken, expiresInTimestamp}`
+   */
+  async authenticate (accessToken = null, refreshToken = null, expiresInTimestamp = 0, username = null, password = null) {
+    if (this.checkAndSetAccesToken(accessToken, expiresInTimestamp)) {
+      return new Token(accessToken, refreshToken, expiresInTimestamp)
+    }
+    if (refreshToken) {
+      return this.authenticateByRefreshToken(refreshToken)
+    }
+    return this.authenticateByClientCredentials(username, password)
+  }
+
   /**
    * Return url for authorize code grant
    *