whole_func_string: function getAuthorization (req) {
    if (!req.headers || typeof req.headers !== 'object') {
      throw new TypeError('argument req is required to have headers property')
    }
  
    return req.headers.authorization
  }
func_code_string: function getAuthorization (req) {
    if (!req.headers || typeof req.headers !== 'object') {
      throw new TypeError('argument req is required to have headers property')
    }
  
    return req.headers.authorization
  }
func_documentation_string: Get the Authorization header from request object.
  @private