When you sign up for an account, you have the option of creating an account directly through your Facebook account, Apple ID account, or phone number.
When you sign up through your phone number, we verify your account by texting you a verification code, and this allows you to sign into your account. Because of this reason, you do not have a password set up for your account.
If you would like to set up your account with a different phone number or apple ID/facebook account, you will have to delete your current account and create a new profile with the desired information.
If you have any additional questions, please click here.