Ok , I read this
Find the key hash for a signed app
which is a good help, but when I try to run my full command line
keytool -exportcert -alias MyAlias -keystore C:\Users\Luiz Aurio\Desktop\Java Project\Android\Mykeystore.kp | C:\OpenSSL-Win32\bin\openssl sha1 -binary | C:\Users\Luiz Aurio\Desktop\Java Project\opencss\bin\openssl base64
I receive this error message
"The input line is too long"
What am I doing wrong here?