The user can change their personal information in the account. To do this, log in to your application. Then click on the Profile button as shown in the screenshot below.

After that you will be taken to a window with all your profile data. Here you can make changes to your profile. You can change your phone number in the first line. Your e-mail can be changed in the second line.
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Once clicked, you immediately need to enter new details (phone or mail). After that you need to verify the changes. For this purpose you will be offered several ways such as using mail, phone number or contacting the technical support.

You can see your personal information in the third line. You cannot change it, as it is directly linked to your profile during registration.
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All this you can see on the screenshot below.
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Here you'll also be able to change your password in the Security bar and the language of your app a little lower down.