Adding new connector D7Messaging (microsoft#2972)

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certified-connectors/D7Messaging/Readme.md

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+# D7Messaging
+
+D7 offers a dependable and affordable cloud-based messaging platform that enables enterprises to engage with their customers through SMS, chat, and various social media platforms.
+
+## Publisher: Signtaper Technologies FZCO
+
+## Prerequisites
+You will need the following to proceed:
+* A Microsoft Power Automate subscription
+* A valid subscription in [D7API](https://app.d7networks.com/)
+* D7API Authentication Token. 
+
+## Supported Operations
+The connector supports the following operations:
+### `D7-Balance`: 
+Get D7API account balance
+
+No parameters are required. 
+
+### `SMS-SendMessage`: 
+Send SMS through D7 SMS Gateway.
+
+Required parameters: content, originator, and recipients
+
+### `NumberLookup`: 
+D7's Number Lookup service to determine the current status of the number.
+
+Required parameters: recipient
+
+### `OTP-SendOTP`: 
+Generate and dispatch an OTP (One-Time Password) to a mobile number.
+
+Required parameters: originator, recipients, and content
+
+### `OTP-ResendOTP`: 
+Request a new OTP (One-Time Password) to be sent to a mobile number.
+
+Required parameters: otp_id
+
+### `OTP-VerifyOTP`: 
+Verify the OTP (One-Time Password) sent to your mobile number.
+
+Required parameters: otp_id, otp_code
+
+### `Viber-SendMessage`: 
+Send a message to a Viber number.
+
+Required parameters: originator, label, recipients, and content
+
+## Obtaining Credentials
+#### Get D7SMS API_Username and API_Password
+- [Register](https://app.d7networks.com/signup) for a D7API account 
+- [Sign In](https://app.d7networks.com/signin) with your email and password and navigate to [API Tokens](https://app.d7networks.com/api-tokens)
+
+Click on "Create Token" and provide a token "Name". 
+
+On the next window, click on "Generate Token" and copy the Token
+
+You're now ready to start using this integration.
+
+## Known Issues and Limitations
+
+To initiate Viber Messaging services, organizations need to register with Viber. For the registration process, please get in touch with [email protected].
+
+## Deployment Instructions
+
+Please use the instructions located [here](https://docs.microsoft.com/en-us/connectors/custom-connectors/paconn-cli) to deploy this connector as custom connector in Microsoft Power Automate, Power Apps or Azure LogicApps.