December 9, 2022

Flutter User Authentication Using Phone Number

Flutter phone authentication is one of the most important features while building any mobile, web, or desktop application. It gives users a personalized experience and helps them leverage easy login methods. Additionally, phone authentication is a secure method of verifying a user, as only you will receive access information while logging in. You immediately get informed about any unknown login attempts being carried out if you authenticate as a user using your phone number. Interestingly, Firebase provides user authentication services to developers. Owing to this, logging in using the phone number doesn’t remain a big deal. We will discuss in detail how to authenticate phone number in any Flutter application. To authenticate phone number with our mobile app, we first need to integrate firebase into our flutter application. If you don’t know how to integrate Flutter with firebase, here is our quick guide to authenticating Firebase with the Flutter application. This guide is surely going to be helpful to you. Let us move on to further steps of authenticating phone numbers to a Flutter application.  Related Post – Flutter CSV field Matching Let’s Get Started It could be a Google account, Twitter account, Facebook, or phone number. In this blog, we will be discussing how to authenticate users through mobile phones in a Flutter application. After that you have integrated Firebase with your Flutter app, it’s time to enable the phone sign-in from the firebase console. To enable phone authentication; go to the Firebase console, open the Authentication tab from the left panel, click the setup sign-up method and then enable the phone verification. You’re all set. For enabling the phone auth, just. 😛 Before moving to the next step, I want you to make sure that you have added the Firebase core plugin and Firebase Authentication plugin to the pubspec.yaml file. These are important to add.    The next step is to verify the phone number that the user wants to log in with. Here is how you do it. Verify Phone Number in Flutter App Firebase has the verifyPhoneNumber function that uses multiple properties to authenticate a phone number in any Flutter app. These properties are phoneNumber, timeout, verificationCompleted, verificationFailed, codeSent, codeAutoRetrievalTimeout. Now let’s take a closer look at each element involved in verifying phone number. FirebaseAuth.instance: Provide access to Firebase Auth using the Firebase app installed on your platform when you installed FlutterFire. phoneNumber: the phone number that you will use to verify the user. timeout: the time after which the code sent to your phone number will expire. verificationCompleted: this property is called when you put in the right OTP.  verificationFailed: it’s also a callback which is called when you enter the wrong OTP or an invalid phone number.  codeSent: this function is called when the OTP has been sent to the given phone number. codeAutoRetrievalTimeout: It is the cooldown time that limits you to request the new code for a few moments. Here is the code to verify the phone number in the Flutter app. Now that you have gone through the basic functions that are going to be used to authenticate phone number in Flutter, let’s discover the UI part. Here is the code to create the flutter phone authentication page. Output: Let’s move to the sign-in part. Here is the code that will allow you to get the OTP on your phone to sign in.  Here is the code to create the OTP page.  Output: Finally, if you enter the valid OPT, you will be successfully logged in to the app through your mobile phone. Here is the code to display that login success message. Output: Conclusion This is it for the quick guide to Flutter phone authentication. We hope that this article would be helpful to you. We would love to hear any suggestions or queries if you have any. If you have an app idea and want to hire flutter developers, then you can count on us.

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Waiting For Another Flutter Command To Release The Startup Lock

While working with Flutter, your VS Code may have shown you this error. It can be annoying at times, especially when you are a beginner. The reason for this “Waiting For Another Flutter Command To Release The Startup Lock” error is due to the malfunctioning of pubspec.yaml file, which may have resulted from multiple dart pub get commands.  Read on to learn how you can resolve this issue in a few quick steps.  Possible Solutions: Here are the possible solutions that you can try to fix the error “waiting for another flutter command to release the startup lock”. 1. Kill All Dart Instances  The easy way to solve this issue is by ending all the instances in the Dart. All you need is to open the terminal and enter these commands:  This command is for Linux. If you are using Windows, enter this command then: If this doesn’t work, move on to the next step.  2. Release the Occupied Lock Before removing the lockfile, you must shut down the Android Studio. The file is located within the Flutter Installation directory. You can release the occupied lockfile through this command in the terminal: The process will be different for Windows, macOS, and Linux. Read on to the next section if your operating system is using Windows.  3. Removing Lockfile in Windows The process to remove lockfile is different for Windows. Here is how you can do it: If that doesn’t work, you can shut down your PC and switch it on, but don’t use the restart function. In case nothing works, you do other things that are discussed in the following sections.  4. Clean the Cache of the Flutter Project For quick Cache clean-up:  The last resort is to get rid of Flutter.  Related Post – Disable Back Button flutter 5. Uninstall Flutter To uninstall Flutter, follow these simple steps: Conclusion This article gave you the solution to resolving the “Waiting For Another Flutter Command To Release The Startup Lock” error. We hope that it helps. We continue to bring such problem-solving guides for you all. Stay in touch with us so you don’t miss out on any future blog releases. To hire flutter developers, you can count on us for any of your flutter app development needs. Our professional and highly skilled Flutter developers will help you get your dream app in no time. Have a glimpse of our app development portfolio to have a better demonstration of what we have built so far.

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