Run a meteor method in before hook and await callback? about meteor-autoform HOT 4 CLOSED

Template.myTemplate.events({
  'submit #testForm' (event, templateInstance) {
    // prevent auto submittion:
    event.preventDefault()

    // get form values
    const { insertDoc } = AutoForm.getFormValues('testForm')

    // validate form data but do not validate the pin here, 
    // just it's type (String or Number; length etc.)
    const ctx = testSchema.newContext()
    ctx.validate(insertDoc, { modifier: false }) // true if updateDoc
    const errors = context.validationErrors()

    // if we have already errors at this stage, add them to form and skip the rest!
    if (errors && errors.length > 0) {
      errors.forEach(err => AutoForm.addStickyValidationError('testForm', err.key, err.type, err.value))
      return
    }
    
    // now let's validate the PIN
    const { pin } = insertDoc
    Meteor.call('validatePinMethod', { pin }, err => {
      // if the server threw an error, add the error to the form and skip
      // see https://github.com/longshotlabs/simpl-schema/blob/main/package/lib/SimpleSchema.js#L906
      if (err) {
        return AutoForm.addStickyValidationError('testForm', 'pin', 'notAllowed', [pin])
      }
      
      // do not forget to remove the error if it passed
      else {
        AutoForm.removeStickyValidationError('testForm', 'pin')
      }
      
      // otherwise submit data to server
      Meteor.call('submitForm', insertDoc, (submissionError, res) => { ... })
    })
  }
})