I need to run an adb forward command before I could use the ezkeyboard application which allows user to type on the phone using browser.
adb forward
When
Mac users just open /Users/(USERNAME)/.bash_profile this file in a editor. and add this line to add path.
/Users/(USERNAME)/.bash_profile
export PATH="/Users/myuser/Library/Android/sdk/platform-tools":$PATH
this is the default path if you install adb via studio. and dont forget to change the username in this line.