failed to deploy Travis CI `Python` : I got the below error when tried to run the build in `travis`. I'm new to travis and following some websites to create the builds for `Python` project.

```=========================== 2 passed in 0.02 seconds ===========================
The command "coverage run -m pytest test.py" exited with 0.
3.23s$ coverage html -d docs/report/coverage/
The command "coverage html -d docs/report/coverage/" exited with 0.
after_success
0.17s$ coveralls
dpl_0
1.25s$ rvm $(travis_internal_ruby) --fuzzy do ruby -S gem install dpl
invalid option "--token="
failed to deploy
```

Any insights will be helpful and i saw `secure` keyword in `.travis.yml` page and may i know what is it and it's use. How to generate the `secure` key in windows?
