FlutLab.io is an online IDE for Flutter. And probably this is the fastest way to play with your first Flutter projects. FlutLab main idea is to provide an alternative to local installations of Android/IOS/Flutter SDK’s as well as Code Editors. In the tool-chain of FlutLab.io, developers can host their projects, collaborate, and do various builds. FlutLab builds are in the focus of this article.
How it looks like
The first thing you want to do with some fantastic examples of Flutter code is to build and run it.
Let’s visit https://flutlab.io and register a free account. You should see some opened project like this:
To see how this code behaves, you can click at the “Build project” button: 
Immediately you can see this build in the progress:
Which will lead to success or failure. And the first (success) option looks like this:
Top comments (1)
How To Integrate Firebase with flutlab ??
Basically Firebase project asking the Debug Signing certificate SHA 1
To get that certificate google firebase documents says execute the following command
keytool -list -v \
-alias androiddebugkey -keystore ~/.android/debug.keystore
Finally My Question is
How to execute these commands in Flutlab.io