Copy the debug.keystore file from your .android folder and paste into your JDK bin Folder. On my machine, it is this:
Open the command prompt. You can find it at Start Menu > All Programs > Accessories > Command Prompt.
Copy the following code and paste it into a text editor like notepad or sticky-notes.
“C:\\Program Files\\Java\\jdk1.7.0_79\\bin\\keytool.exe” -exportcert -alias androiddebugkey -keystore “C:\\Users\\Kendra.android\\debug.keystore” | “C:\\openssl\\bin\\openssl.exe” sha1 -binary | “C:\\openssl\\bin\\openssl.exe” base64
Make sure that you replace my paths, with the paths that you have. Your “jdk1.7.0_79” may be different and your username (where “Kendra” is in the script) is probably different.
Copy your script and paste it into your Command Prompt. You will need to right click and select paste since you cannot use your keyboard shortcuts.
Hit the Enter key on your keyboard.
Your Command Prompt should spit out some letters and numbers on the next line. Now check your Unity 5 project. The error saying that your key should be gone. If it is gone, you are good to go.
If your Unity project is still displaying an error, it is probably something along the line of OpenSSL not found. You will need to add the OpenSSL directory to your path. Continue on.
Click Next below