Validates the answers the end-user gave to the questions collected from GET /v2/users/userId/cancellations/form-elements. If answers are valid then a letter of attorney is created which can be signed by the user. After the letter of attorney is signed you create the cancellation with Create cancellation. If the answers are not valid an error is returned describing which questions had invalid answers.
Note: The user needs to have a name set in order for this to work. See POST /v1/users.
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