Apple now requires two-factor authentication for app ownders to sign in to their Apple Developer account. Setting up two-factor authentication is a simple process (see instructions here https://support.apple.com/en-us/HT204915). You must use an Apple device — phone, tablet or computer — to set up two-factor authentication.
After setting up two-factor authentication, please add 503.841.9494 to the list of trusted phone numbers. This will allow us to access your account to make necessary updates.
Please be aware that this is not an optional step if you have an Apple app. You will eventually lose the ability to update your app and send out push notifications if this is not done. If you set up your account with LRIS Mobile Apps after January 1, 2019 then you already have two-factor authentication set up. Customers with accounts set up prior to January 1, 2019 should log into https://appleid.apple.com/#!&page=signin and make sure two-factor authentication is set up and 503.504.1186 is added as a trusted phone number.