Can I get phone number on google sign in? - google-plus

I added google+ sign in to my android app. so through google+ login can I get the phone number, country, DOB etc etc ? Now I have only name, email, userid etc

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React Native Expo autofill field with current system user's email

I want to autofill a TextInput with the user's current Email from the Android/iOS system. However, at that point the user is not yet authenticated, because that's actually part of the registration (where users can also use a different Email).
How do I get this email?
I checked the permissions page but there is none of them about the user credentials like email.
I also checked expo Contacts but it seems to be related only to the contact lists and not about the current system user.
Is this even possible with RN+expo?

How to get a user public information by Instagram User ID?

I have an Instagram User ID and I want to get:
user profile picture
username
full name
on Instagram.
How can I do it?
You can't with the new Graph API.

When does authorization occur during app login?

I'm currently building the login/registration part of an application (similar to WhatsApp login).
The flow is as follows:
Screen #1: User enters phone number for authentication
Screen #2: the user will need to enter a 4 digit number (which was sent via SMS) to verify the phone number
Screen #3: In the case where the user is a new user, s/he will enter the full name. If the user is a returning user, screen #3 will not show up (jump to screen #4).
Screen #4: User is taken to the home screen of the app.
My question here is: will the access token and the refresh token be returned in screen #2 from phone verification API OR in screen #3 from entering the full name API?
I also want to know what the return value of phone verification and entering full name APIs.

AWS Cognito hosted UI signup: is it possible to drop username field?

Is it possible to elliminate Username field on sign-up screen?
In the Attributes tab I have only one required field - email. And I do not know why but this menu is blocked - and I can not alter sign-in attributes from Username to Email address or phone number:
The only way to do this is select the 'Email address or phone number' option. These preferences can be modified only at the time of User Pool creation.

How do I add an individual Google+ contact to Glass without an email address?

I have someone in my Google+ circles who hasn't shared their e-mail address with me. I would like to be able to share photos with this person individually through Glass, so I want to add them as a contact on the MyGlass webpage. I click "Add a contact", but their name is not recognized. I go to https://www.google.com/contacts and find the person under Circles, then I add them to the "My Contacts" group -- this doesn't help. Do I have to make a separate Circle just for this one person so I can see them individually on Glass?
It seems Google will only add individual contacts to MyGlass which have either a phone number or an e-mail address.
Add a dummy e-mail address like 'user#example.com' (or a disposable alias you control) to their profile in My Contacts. Afterwards you'll be able add this contact from MyGlass and it will show up as an individual G+ Contact on Glass. Photo sharing will work via G+, but remember not to "Send a Message" to this contact; Glass will try to use the dummy e-mail address.