Add validation

[dlongley]

[mattcollier]

Has not been address, marking P2.

[mandyvenables]

• validate('services.authn.token.postRecovery')

• validate({query: 'services.authn.token.getClientRegistrationQuery'})

• validate({query: 'services.authn.token.getClientRegistrationQuery'})

• validate('services.authn.token.postRequirements')

• validate('services.authn.token.postLogin')

• validate({query: 'services.authn.token.getTokensQuery'})

• validate({query: 'services.authn.token.postToken.query'})

• validate({query: 'services.authn.token.postToken'})

[JSAssassin]

• also validate typeOptions https://github.com/digitalbazaar/bedrock-authn-token-http/blob/generate-machine-type-for-token-client-registration/lib/index.js#L56