GMail API - authorising a second email account - vb.net

I am developing an app using VB.Net for accessing my GMail accounts. I was able to follow the steps given at .Net Quickstart and was able to able access one of my accounts. So whenever I run my app, it accesses my first gmail account automatically, which is fine. Now I would like to access my other gmail account using the same app. How to change the gmail account that is automatically accessed by my desktop app?
This is similar to this question, but I am not able to understand the answer provided there
Thanks in advance for your answers

Before using your app, you need to log out of the default gmail account (i.e., first gmail account in your case). So I think you need to log out from that first gmail account, then log in with the second gmail account and try to sign in from your app. Hope this helps!

Finally I found out where the authorization information is stored. It is stored in Environment.SpecialFolder.ApplicationData folder. A folder named Google.Apis.Auth is created under this folder and a new file with the authorization information is created under it (in my case it is C:\Users\myWindowsUserName\AppData\Roaming\Google.Apis.Auth). I deleted the file which was there, which had the token for my first gmail ID. When I ran my app again, it asked for user login and consent once again, at which point I provided details of my second gmail account. This pearl is available here

Related

How to set up Google sheets API for personal use

I'm trying to follow the instructions here which tell me to create credentials via the instructions here, which as step 6 tells me 'Click the user type for your app. If you're running a Quickstart, select Internal.'
On the page in question, 'Internal' is greyed out, and tells me I can't select it because I'm not a Google Workspace user. Going to Google Workspace, it tells me I need a domain name for 'my business'. Since I don't have a business, or any domain that would have anything to do with this project (I just want to push some personal data from the command line to a sheet), I don't seem to be able to proceed. Is the Google Sheets API just not available for such use?
If you don't have a Workspace account but you don't want to publish your app publicly (and go through the associated review by Google), you can set the app to External and test the app instead of publishing it.
In order to do that, just add yourself as Test user when setting the OAuth consent screen, and leave the Publishing status on Testing, don't change it to In production:
Testing
Projects configured with a publishing status of Testing are limited to up to 100 test users listed in the OAuth consent screen. A test user consumes a project's test user quota once added to the project.
Google will display a warning message before allowing a specified test user to authorize scopes requested by your project's OAuth clients. The warning message confirms the user has test access to your project but should consider the risks associated with granting access to their data to an unverified app.
Authorizations by a test user will expire seven days from the time of consent. If your OAuth client requests an offline access type and receives a refresh token, that token will also expire.
Reference:
Publishing status: Testing
Unfortunately, that means that the authorization lasts only for 7 days. Which means that I have to keep creating new projects every 7 days, which is untenable. Here is the excerpt from the "Setting up your OAuth consent screen" page on the Google support site.
Authorizations by a test user will expire seven days from the time of consent. If your OAuth client requests an offline access type and receives a refresh token, that token will also expire.

How to fix login process to dialogflow after I have attached gmail to my non-gmail account?

I had a Google account based on not-GMail-account. I had another email company's email as a login to my Google Account (myemailhere#ukr.net). And I used this Google account to login the dialogflow.cloud.google.com.
Today Google suggested me to create a #gmail.com account and attcach it to my myemailhere#ukr.net Google Account. I have confirmed and created the myemailhere#gmail.com.
Using both of this logins (myemailhere#gmail.com and myemailhere#ukr.net) I am still able to login my cloud.google.com Profile. But when I try to login the Dialogflow Profile (dialogflow.cloud.google.com) - I see the eternal loading animation (or a totally blank page). There is no errors about password or something like this. Just login process after I submit the password and then white page. This behavior I see on all my devices, while I trying to login with myemailhere#gmail.com or myemailhere#ukr.net
And I see some 400 errors in web console (if it matters).
Could you please help me to fix this and get access to DialogFlow?
Screen that I see after the login and password entering
Do you have the project owner role for the mentioned username that is registered on your project in the GCP console (not Dalogflow Console)? Here is a list of roles related to Dialogflow that grant access to its Console.
Note that some of these roles give full access or edit access while other roles have permissions that simply gives view access to the Dialogflow Console.
If you are missing any of these then simply assign on your GCP project's console.
Assigning roles as described above did not work for me. Solution was to delete gmail email service from the account.
Instructions here
If you would like to use gmail, do NOT add gmail to your existing google account. You should instead create a seperate google account and use gmail from this seperate account

How to tie an account from a backend server to a google assistant user

I have a web application setup to handle webhook requests from an Actions-on-Google/Dialogflow application using the Google Assistant. Users don't need to sign-in to a google account in order to use my web application and I'd prefer to keep it that way, so that users can sign in with any email address.
I also want my users to be able to interact with my application using the Google Assistant, and be able to access personal/contextual data via the assistant (i.e. when a speaker says, "what's on my shopping list", the web app needs to be able to know what my means).
Currently, I have this working by using my web app to issue a unique short code to my user (in the web app UI) and then with an intent on the Assistant where the speaker says "My code is 1-2-3-4" and then my web app can identify the user from then on (by saving the userId from the webhook request to whatever user got the short code 1234 and then using that userId to lookup the user on each subsequent request.)
My question is, is there a better way to do this? Ideally, in my web app, I'd like to have something like an "Authorize Google Assistant" button, which would then link the user's google account to their web-app account, so that the conversation on the Assistant is seamless.
Has anyone done this before?
Thanks
This is the perfect use case for Account Linking with the Google Assistant.
From your users' perspective, they will start to use your Action. If they're doing so through a speaker and they haven't linked the account yet, they'll be directed to a mobile device to do so. On a mobile device, they'll be redirected to a page on your website where they will been to authenticate themselves and authorize your server to let them in through the Assistant. Once they have done so, they won't need to log in again, the accounts will be linked, and they'll be able to use the voice Action without further obstruction.
From your perspective as a developer, you'll need to setup an OAuth2 server (I suggest the code flow). That login process I mentioned is the first step in the OAuth dance, and will end up with you issuing a code to Google. They will then exchange this code for an Auth Token (with a limited lifetime) and a Refresh Token (which does not expire). They will periodically use the Refresh Token to get new, valid, Auth Tokens for this user. When the user issues a voice command, the Auth Token will be passed as a field in the JSON to your fulfillment server, and you can use this to verify who the user is and that they are authorized to use your service.

Google Authentication via PHP Client Library/oAuth2

I have searched long and far for this on Google Identity documentation but my question seems to be out of it's scope (https://developers.google.com/identity/protocols/OAuth2).
This is what I have:
I have an app that is using Google's PHP Client library to authenticate a user via oAuth2. My application stores the retrieved token & refresh token from a user. I am able to use this token and refresh token to pull in information from various Google API's (Drive, Calendar, Mail, etc). I am also storing a cookie in browser to keep the user logged in to the application when the user closes the browser. I have created a simple way for users to login to the application via a QR code that matches up their stored token and refresh token. After the first login they are able to simply use a badge to login to the application.
This is what I want but don't know how to do
When a user logs into the application with their QR badge everything work perfectly (I am still able to pull in anything via the PHP Client Library/Google API's), however when a user goes to Gmail, Drive, or other Google service, Google is asking them to login (it's because they are not technically authenticated with accounts.google.com (only my application)). Is there a way to programmatically authenticate a user to accounts.google.com via a stored token/refresh token?
I was searching for a proper way to implement authentication of users with Google accounts into an app I'm developing. One thing led to another and I found this:
https://github.com/thephpleague/oauth2-google
They have a few implementations depending on how you may wish to implement OAuth2 (via separate repositories). I believe this directly answers your question, albeit 3.4 years later. Hopefully it will help someone else who is looking for this info.

Netflix doesn't logout other open sessions with password change

I've recently been doing a bit of web development so I've been thinking more about authentication and stuff. On Netflix I noticed there is an extra option on the Account page to de-authorize other devices. My girlfriend changed her password but I was still able to use it without re-entering the password till she logged out other devices.
So my question is how does authentication for Netflix work if it doesn't have to locally store your password?
Netflix uses a version of Open autentication to allow a device to access an account. Once the device has been authorized it will then have access to that account until its has been deautorized.
Chaning password doesnt matter becouse the device has autorization already probably in the form of a refresh token stored someplace. So its not storing a password its storing an autorization token of some kind.
Lets use facebook as an example: (response to comment below)
https://www.facebook.com/settings?tab=applications
This shows a list of all the crap I have loged in to using my facebook account. Now I have probably changed my facebook password sevral times it wont matter I will still have access. Some of these are mobil apps i have installed on my cellphone at one time or another. Even if i dont use them they still have access.
This doesn't technically answer the question, but is related and, I think, helpful:
You can forcefully invalidate the previously-validated tokens for other devices by going to https://www.netflix.com/ManageDevices - as soon as you go to the page it will ask if you want to sign out other devices.
(from "Someone is using my Netflix account without my permission" at https://help.netflix.com/en/node/18)