Registration Processing for Contractor Account

**Accessing some details and performing certain tasks need permission**
Phenom allows for authorized users to view certain data and place bids, hence user will need to register before gaining access.

**Registration processing is required**
To be given access to restricted data and place bid, a user needs to register. You are required to help the team develop a registration processing model using the details on the [registration interface designed here](https://github.com/BuildForSDG/Phenom-Frontend/issues/8) for contractors.

**TIP**
- You need to first ensure this user is not already logged-in
- You need to ensure the request is coming from an allowed IP (Only those in Nigeria should be able to do this) to prevent abuse).
- The request must come in json format to be accepted
- The response most be in json format
- Respond with status and message
- Provided Email should be unique