Custom Message Issue

Custom message is not working, i have used the sample code to send OTP

```
from sendotp import sendotp

otpobj =  sendotp.sendotp('Autk-Key','my message is {{otp}} keep otp with you.')

# 3245 is the otp to send
print(otpobj.send(919981534313,'msgind',3245))
```
But received message as 
_"Your OTP Verification Code is 3245. Do not share it with anyone. Dash."_

