def call(user_phone,gardener_phone,twilio_number)
client = Twilio::REST::Client.new(ENV["TWILIO_SID"],
ENV["TWILIO_AUTH_TOKEN"])
client.calls.create(
  from: twilio_number,
  to: gardener_phone,
  url: connect_call(user_phone, twilio_number)
)
end

def connect_call(user_phone,twilio_number)
 response = Twilio::TwiML::VoiceResponse.new
 response.dial caller_id: twilio_number do |dial|
  dial.number user_phone
 end
 render xml: response.to_xml
end

Twilio::REST::RestError (Unable to create record: Url is not a valid
URL: <?xml version="1.0" encoding="UTF-8"?><Response><Dial
callerId="+44203*****"><Number>+447743******</Number></Dial>
</Response>):`