You may also connect your Discord account to your phone number.
Navigate to the My Account option in your User Settings to begin the phone verification procedure. Then, alongside the Phone Number field, tap the Add button.
Once you've pressed it, you'll be able to directly enter your phone number and then press "Send" once you've done so. (Remember to choose the correct country code)
You'll then receive a text message with a 6-digit number to your mobile device. Type those six digits into the menu when you get the code.
Last but not least, you'll need to enter your account password and then select the Confirm button to confirm your changes.
After that, your Discord account will be officially validated with your phone number.