Actors: Developer, End user, Cripsa Platform

• Developer's Goal: Register with Cripsa, create a WhatsApp project, integrate WhatsApp sign-in screen, and authenticate successfully.
• User's Goal: Log in using WhatsApp authentication, receive an OTP, verify OTP, and access the customer portal.

• Developer Registration: The developer registers on cripsa.com to access the Cripsa platform.
• Request Authentication from WhatsApp Application: The developer requests authentication from the WhatsApp application on Cripsa.
• Receive Authentication Token: Cripsa provides an authentication token to the developer after successful authentication.
• Access Developer Dashboard: The developer logs in to Cripsa and accesses the Developer Dashboard.
• Create WhatsApp Project: The developer creates a WhatsApp project within the dashboard.
• Receive Project Information: Cripsa generates and provides the developer with Client ID, Client Secret, User Pool ID, and User Pool Domain.
• Develop WhatsApp Sign-In Screen: The developer uses the provided API endpoints ("whatsapp-signin" and "whatsapp-responseToauth") to create the WhatsApp sign-in screen.
• Authentication with WhatsApp: The developer logs in using their mobile number, clicks the login button, and is directed to the OTP screen.
• Receive OTP: The developer receives an OTP on WhatsApp and a session ID is generated.
• Verify OTP: The developer enters the OTP on the OTP screen and clicks the sign-in button.
• Call API for Verification: In the backend, the "whatsapp-verifyAuthChallenge" API endpoint is called to verify the session ID and OTP.
• Receive Tokens: Upon successful verification, Cripsa responds with various tokens (refresh token, ID token, and access token).
• Successful Authentication: The developer's session is established, and they are redirected to the relevant page on the dashboard.

• User Registration: The end user accesses the customer portal with the integrated WhatsApp sign-in screen.
• WhatsApp Authentication Initiation: The user logs in using their mobile number and clicks the login button.
• OTP Generation: The user receives an OTP on WhatsApp, and a session ID is generated. The user enters the OTP on the OTP screen and clicks the sign-in button.
• Call API for Verification: The "whatsapp-verifyAuthChallenge" API is called in the backend to verify the session ID and OTP.
• Receive Tokens: After successful verification, Cripsa responds with tokens (refresh token, ID token, and access token).
• Access Customer Portal: The user's session is established, and they are redirected to the relevant page within the customer portal.

• Developer achieves secure authentication through WhatsApp.
• User gains seamless access to the customer portal using WhatsApp authentication.

• Developer has registered on cripsa.com.
• User has a WhatsApp account.

• Developer is authenticated and redirected to the dashboard.
• User is authenticated and gains access to the customer portal.

• Incorrect OTP entry leads to failed verification.
• Developer/User session fails due to network issues.

• Developer/User initiates WhatsApp authentication by entering mobile number and clicking login button.