diff --git a/scripts/install b/scripts/install
index 7577b1d..5a1cce4 100644
--- a/scripts/install
+++ b/scripts/install
@@ -143,10 +143,12 @@ ynh_app_setting_set "$app" db_name "$db_name"
 ynh_app_setting_set "$app" db_user "$db_user"
 ynh_mysql_setup_db "$db_user" "$db_name"
 
-zcat /usr/share/doc/zabbix-server-mysql*/create.sql.gz | mysql -u"$db_user" -p"$db_pwd" "$db_name"
+export mysqlconn="mysql -u $db_user -p $db_pwd $db_name"
+
+zcat /usr/share/doc/zabbix-server-mysql*/create.sql.gz | $mysqlconn
 
 #sso integration
-mysql -u"$db_user" -p"$db_pwd" "$db_name" -e "UPDATE \`config\` SET \`http_auth_enabled\` = '1', \`http_login_form\` = '1' WHERE \`config\`.\`configid\` = 1;"
+$mysqlconn -e "UPDATE \`config\` SET \`http_auth_enabled\` = '1', \`http_login_form\` = '1' WHERE \`config\`.\`configid\` = 1;"
 
 if [ "$language" == "fr" ];then
     lang="fr_FR"
@@ -158,8 +160,8 @@ fi
 surname=$(ynh_user_get_info "$admin" lastname)
 name=$(ynh_user_get_info "$admin" firstname)
 
-mysql -u"$db_user" -p"$db_pwd" "$db_name" -e "INSERT INTO \`users\` (\`userid\`,\`alias\`, \`name\`, \`surname\`, \`passwd\`, \`url\`, \`autologin\`, \`autologout\`, \`lang\`, \`refresh\`, \`type\`, \`theme\`, \`attempt_failed\`, \`attempt_ip\`, \`attempt_clock\`, \`rows_per_page\`) VALUES (3,'$admin', '$admin', '$admin', '5fce1b3e34b520afeffb37ce08c7cd66', '', 0, '0', '$lang', '30s', 3, 'default', 0, '', 0, 50);"
-mysql -u"$db_user" -p"$db_pwd" "$db_name" -e "INSERT INTO \`users_groups\` (\`id\`, \`usrgrpid\`, \`userid\`) VALUES (5, 7, 3);"
+$mysqlconn -e "INSERT INTO \`users\` (\`userid\`,\`alias\`, \`name\`, \`surname\`, \`passwd\`, \`url\`, \`autologin\`, \`autologout\`, \`lang\`, \`refresh\`, \`type\`, \`theme\`, \`attempt_failed\`, \`attempt_ip\`, \`attempt_clock\`, \`rows_per_page\`) VALUES (3,'$admin', '$admin', '$admin', '5fce1b3e34b520afeffb37ce08c7cd66', '', 0, '0', '$lang', '30s', 3, 'default', 0, '', 0, 50);"
+$mysqlconn -e "INSERT INTO \`users_groups\` (\`id\`, \`usrgrpid\`, \`userid\`) VALUES (5, 7, 3);"
 
 #users creation in zabbix database
 i=4
@@ -168,15 +170,12 @@ do
     if [ "$user" != "$admin" ];then
         surname=$(ynh_user_get_info "$user" lastname)
         name=$(ynh_user_get_info "$user" firstname)
-        mysql -u"$db_user" -p"$db_pwd" "$db_name" -e "INSERT INTO \`users\` (\`userid\`, \`alias\`, \`name\`, \`surname\`, \`passwd\`, \`url\`, \`autologin\`, \`autologout\`, \`lang\`, \`refresh\`, \`type\`, \`theme\`, \`attempt_failed\`, \`attempt_ip\`, \`attempt_clock\`, \`rows_per_page\`) VALUES ($i,'$user', '$name', '$surname', '5fce1b3e34b520afeffb37ce08c7cd66', '', 0, '0', '$lang', '30s', 1, 'default', 0, '', 0, 50);"
+        $mysqlconn -e "INSERT INTO \`users\` (\`userid\`, \`alias\`, \`name\`, \`surname\`, \`passwd\`, \`url\`, \`autologin\`, \`autologout\`, \`lang\`, \`refresh\`, \`type\`, \`theme\`, \`attempt_failed\`, \`attempt_ip\`, \`attempt_clock\`, \`rows_per_page\`) VALUES ($i,'$user', '$name', '$surname', '5fce1b3e34b520afeffb37ce08c7cd66', '', 0, '0', '$lang', '30s', 1, 'default', 0, '', 0, 50);"
         i=$((i+1))
     fi
 done
 
-#disable default guest 
-lastid=$(mysql -u"$db_user" -p"$db_pwd" "$db_name" -BN -e "SELECT max(id) from \`users_groups\`")
-lastid=$(("$lastid" + 1 ))
-mysql -u"$db_user" -p"$db_pwd" "$db_name" -e "INSERT INTO \`users_groups\` (\`id\` , \`usrgrpid\`, \`userid\`) VALUES ($lastid ,9, 2);"
+disable_guest_user()
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
@@ -469,9 +468,7 @@ fi
 # disable default admin 
 #=================================================
 ynh_print_info "disable default admin"
-lastid=$(mysql -u"$db_user" -p"$db_pwd" "$db_name" -BN -e "SELECT max(id) from \`users_groups\`")
-lastid=$((lastid + 1 ))
-#mysql -u"$db_user" -p"$db_pwd" "$db_name" -e "INSERT INTO \`users_groups\` (\`id\` , \`usrgrpid\`, \`userid\`) VALUES ($lastid ,9, 1);"
+disable_admin_user()
 
 #=================================================
 # SETUP SSOWAT