Additional cert checks

src/freedombone-app-vpn

         echo $'VPN user cert not generated'
         exit 783528
     fi
+    user_cert=$(cat /etc/openvpn/easy-rsa/keys/$username.crt)
+    if [ ${#user_cert} -lt 10 ]; then
+        cat /etc/openvpn/easy-rsa/keys/$username.crt
+        echo $'User cert generation failed'
+        exit 634659
+    fi
     if [ ! -f /etc/openvpn/easy-rsa/keys/$username.key ]; then
         echo $'VPN user key not generated'
         exit 682523
     fi
+    user_key=$(cat /etc/openvpn/easy-rsa/keys/$username.key)
+    if [ ${#user_key} -lt 10 ]; then
+        cat /etc/openvpn/easy-rsa/keys/$username.key
+        echo $'User key generation failed'
+        exit 285838
+    fi
 
     user_vpn_cert_file=/home/$username/$OPENVPN_KEY_FILENAME