diff --git a/scripts/_common.sh b/scripts/_common.sh
index 146de15..055ffdd 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -63,6 +63,19 @@ function perform_db_migrations {
 	sudo -u $app $final_path/venv/bin/envdir $env_path $final_path/venv/bin/python $final_path/manage.py migrate
 }
 
+function get_app_settings {
+	domain=$(ynh_app_setting_get --app=$app --key=domain)
+	path_url=$(ynh_app_setting_get --app=$app --key=path)
+	final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+	data_path=$(ynh_app_setting_get --app=$app --key=data_path)
+	admin=$(ynh_app_setting_get --app=$app --key=admin)
+	secret_key=$(ynh_app_setting_get --app=$app --key=secret_key)
+	admin_email=$(ynh_user_get_info --username=$admin --key="mail")
+	db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+	db_user="$db_name"
+	db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
+}
+
 #=================================================
 # EXPERIMENTAL HELPERS
 #=================================================
diff --git a/scripts/backup b/scripts/backup
index 511536f..a01aa8b 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -25,10 +25,7 @@ ynh_print_info --message="Loading installation settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-final_path=$(ynh_app_setting_get --app=$app --key=data_path)
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+get_app_settings
 
 #=================================================
 # DECLARE DATA AND CONF FILES TO BACKUP
diff --git a/scripts/change_url b/scripts/change_url
index e3f6270..4e84165 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -22,8 +22,7 @@ app=$YNH_APP_INSTANCE_NAME
 #=================================================
 ynh_script_progression --message="Loading installation settings..." --weight=1
 
-# Needed for helper "ynh_add_nginx_config"
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+get_app_settings
 
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
diff --git a/scripts/install b/scripts/install
index 5c2897b..fef2b4d 100755
--- a/scripts/install
+++ b/scripts/install
@@ -53,7 +53,6 @@ ynh_script_progression --message="Storing installation settings..." --weight=1
 ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
 ynh_app_setting_set --app=$app --key=admin --value=$admin
-ynh_app_setting_set --app=$app --key=admin_email --value=$admin_email
 ynh_app_setting_set --app=$app --key=random_key --value=$secret_key
 
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index ad142e9..49d1143 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -15,11 +15,7 @@ ynh_script_progression --message="Loading installation settings..." --weight=1
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-db_name=$(ynh_app_setting_get --app=$app --key=db_name)
-db_user=$db_name
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-data_path=$(ynh_app_setting_get --app=$app --key=data_path)
+get_app_settings
 
 #=================================================
 # STANDARD REMOVE
diff --git a/scripts/restore b/scripts/restore
index ac949b3..617b42a 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -25,12 +25,7 @@ ynh_script_progression --message="Loading installation settings..." --weight=1
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-path_url=$(ynh_app_setting_get --app=$app --key=path)
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-db_name=$(ynh_app_setting_get --app=$app --key=db_name)
-db_user="$db_name"
-data_path=$(ynh_app_setting_get --app=$app --key=data_path)
+get_app_settings
 
 #=================================================
 # CHECK IF THE APP CAN BE RESTORED
diff --git a/scripts/upgrade b/scripts/upgrade
index 6e15cf1..11d1838 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -15,10 +15,7 @@ ynh_script_progression --message="Loading installation settings..." --weight=1
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get --app=$app --key=domain)
-path_url=$(ynh_app_setting_get --app=$app --key=path)
-final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-data_path=$(ynh_app_setting_get --app=$app --key=data_path)
+get_app_settings
 
 #=================================================
 # CHECK VERSION
@@ -35,6 +32,7 @@ if [ -z "$data_path" ]; then
 	ynh_app_setting_set --app=$app --key=data_path --value=$data_path
 	ynh_app_setting_delete --app=$app --key=datadir
 	ynh_app_setting_delete --app=$app --key=db_pwd
+	ynh_app_setting_delete --app=$app --key=admin_email
 fi
 
 #=================================================