Create a credit product

Create a new credit product.
Request fields:

• name: The name of the credit product
• portfolio_type: Enum, the type of credit (i.e. REVOLVING)
• account_type: Refer to CRRG Exhibit 1 for possible values
• terms_frequency: Enum, the frequency for payments due (i.e WEEKLY, MONTHLY)
• reported_consumer_account_number_required: allows for the partner to pass
  their own account number when creating an account.
• required_ssn:Boolean, whether or not the SSN is required for the credit product.