➤Now click on Edit Public Profile & Url, which you can see in top right section of your profile page or simply click on this link to go there –) Link . You can also see reference image below for better understand.
➤ Now you come to the page where you can finally change your username, below mention image will help you to chage your username easily !
➤ Open your android account ! See the top left side of your mobile and click on that button ! Now click on View Profile . See below reference image
➤ Now after you have clicked , Click on top right setting button , See below reference image
➤After you have clicked , you will see privacy option and now click on that !! Click on edit your public profile .
➤ Now click on edit your custom url and replace or change your custom username as per your wish
➤ Hope you liked my work and you must have changed your username successfully !