Missing Validation In Messaging Configuration Inputs

Bug Description

The input for the details of Messaging config does not validate input. For example, the following payloads to /api/v1/messaging/default are not validated and are allowed to be submitted:

mailgun - an invalid domain name may be passed

{
    "service_type": "mailgun",
    "details": {
        "domain": "this is an invalid domain" 
    }
}

sendgrid - an invalid email (here, just a domain name without an address) may be passed.

{
    "service_type": "twilio_email",
    "details": {
        "twilio_email_from": "example.com"
    }
}

Steps to Reproduce

Launch an instance of Fides
Try to create a twilio_email messaging configuration, but pass in a domain name instead of an email address
Send a test email and receive an error

Expected behavior

Instead of creating the resource, the Fides webserver should return a 400 error.

Screenshots

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Environment

Version:
OS:
Python Version:
Docker Version:

Additional context

I discovered this issue when I accidentally passed a domain name to the twilio_email_from field instead of an email. Fides allowed the input and then when I went to send a test email, I received the following error: There was an error sending the test message: Email failed to send due to: HTTP Error 400: Bad Request. The subsequent error message appears to be caused by passing an invalid from email to Sendgrid.

ethyca / fides