diff --git a/conf/base.config.yaml b/conf/base.config.yaml
index 6d92260..4ce0bef 100644
--- a/conf/base.config.yaml
+++ b/conf/base.config.yaml
@@ -108,7 +108,7 @@ database:
   # with username "user", password "pass", host "localhost" and database name "dbname".
   #
   # Modify each value as necessary
-  connString: "postgresql://__DB_USER__:__DB_PASSWORD__@localhost/__DB_NAME__"
+  connString: "postgresql://__DB_USER__:__DB_PWD__@localhost/__DB_NAME__"
 
   # Use SQLite3 as a database backend
   #
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 4974ea8..ee8ef00 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -12,33 +12,3 @@ NODEJS_VERSION=14
 #=================================================
 # PERSONAL HELPERS
 #=================================================
-
-install_node_deps() {
-    pushd "$final_path"
-        ynh_use_nodejs
-        ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH npm install
-    popd
-}
-
-run_registration() {
-    pushd "$final_path"
-        ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH NODE_ENV=production $final_path/run.sh -r -f "$app.yaml"
-    popd
-}
-
-setup_final_path_rights() {
-    chmod 750 "$final_path"
-    chmod -R o-rwx "$final_path"
-    chown -R $app:$app "$final_path"
-}
-
-setup_run_script_rights() {
-    chmod 750 "$final_path/run.sh"
-    chown "$app:$app" "$final_path/run.sh"
-}
-
-create_etc() {
-  local etc_path=$1
-  mkdir -p -m 750 "$etc_path"
-  chown "$app:$app" "$etc_path"
-}
diff --git a/scripts/install b/scripts/install
index 6a31ceb..af3effd 100755
--- a/scripts/install
+++ b/scripts/install
@@ -45,10 +45,6 @@ log_path="/var/log/$app"
 base_config_path="$final_path/base.config.yaml"
 user_config_path="/etc/$app/user.config.yaml"
 
-ynh_print_OFF
-db_password=$(ynh_string_random --length=30)
-ynh_print_ON
-
 #=================================================
 # CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
 #=================================================
@@ -64,9 +60,6 @@ ynh_script_progression --message="Storing installation settings..." --weight=1
 ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=log_path --value=$log_path
 ynh_app_setting_set --app=$app --key=app_service_registration_path --value=$app_service_registration_path
-ynh_print_OFF
-ynh_app_setting_set --app=$app --key=db_password --value=$db_password
-ynh_print_ON
 ynh_app_setting_set --app=$app --key=synapse_instance --value=$synapse_instance
 
 #=================================================
@@ -109,7 +102,7 @@ ynh_script_progression --message="Creating a PostgresSql database..." --weight=1
 db_name=$(ynh_sanitize_dbid --db_name=$app)
 db_user=$db_name
 ynh_app_setting_set --app=$app --key=db_name --value=$db_name
-ynh_psql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_password
+ynh_psql_setup_db --db_user=$db_user --db_name=$db_name
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
@@ -119,14 +112,19 @@ ynh_script_progression --message="Setting up source files..." --weight=1
 ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 ynh_setup_source --dest_dir="$final_path"
 
-setup_final_path_rights
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:$app "$final_path"
 
 #=================================================
 # INSTALL NODE DEPENDENCIES
 #=================================================
 ynh_script_progression --message="Building Node dependencies..." --weight=30
 
-install_node_deps
+pushd "$final_path"
+  ynh_use_nodejs
+  ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH npm install
+popd
 
 #=================================================
 # SETUP PIP (FOR YQ)
@@ -143,7 +141,9 @@ ynh_script_progression --message="Adding configuration files..." --weight=1
 
 etc_path=$(dirname $user_config_path)
 ynh_app_setting_set --app=$app --key=etc_path --value=$etc_path
-create_etc "$etc_path"
+
+mkdir -p -m 750 "$etc_path"
+chown "$app:$app" "$etc_path"
 
 any_account_of_domain="@.*:${domain//\./\\\.}"
 
@@ -174,7 +174,9 @@ ynh_script_progression --message="Configuring a systemd service..." --weight=1
 
 # Create startup script
 ynh_add_config --template="../sources/extra_files/app/run.sh" --destination="$final_path/run.sh"
-setup_run_script_rights
+
+chmod 750 "$final_path/run.sh"
+chown "$app:$app" "$final_path/run.sh"
 
 # Create a dedicated systemd config
 ynh_add_systemd_config
@@ -198,7 +200,10 @@ chown $app:$app "$log_path"
 #=================================================
 ynh_script_progression --message="Register module in Synapse" --weight=1
 
-run_registration
+pushd "$final_path"
+    ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH NODE_ENV=production $final_path/run.sh -r -f "$app.yaml"
+popd
+
 cp "$final_path/$app.yaml" $app_service_registration_path/$app.yaml
 /opt/yunohost/matrix-$synapse_instance/update_synapse_for_appservice.sh \
     || ynh_die "Synapse can't restart with the appservice configuration"
diff --git a/scripts/remove b/scripts/remove
index 0e0c913..5f50d04 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -24,10 +24,6 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 log_path=$(ynh_app_setting_get --app=$app --key=log_path)
 etc_path=$(ynh_app_setting_get --app=$app --key=etc_path)
 
-ynh_print_OFF
-db_password=$(ynh_string_random --length=30)
-ynh_print_ON
-
 #=================================================
 # STANDARD REMOVE
 #=================================================
@@ -75,16 +71,6 @@ ynh_script_progression --message="Removing app main directory..." --weight=1
 # Remove the app directory securely
 ynh_secure_remove --file="$final_path"
 
-#=================================================
-# CLOSE A PORT
-#=================================================
-
-if yunohost firewall list | grep -q "\- $port$"
-then
-	ynh_script_progression --message="Closing port $port..." --weight=1
-	ynh_exec_warn_less yunohost firewall disallow TCP $port
-fi
-
 #=================================================
 # SPECIFIC REMOVE
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 3fb82ba..95c627a 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -58,7 +58,9 @@ ynh_script_progression --message="Restoring the app main directory..." --weight=
 
 ynh_restore_file --origin_path="$final_path"
 
-setup_final_path_rights
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:$app "$final_path"
 
 #=================================================
 # SPECIFIC RESTORATION
@@ -78,12 +80,10 @@ ynh_use_nodejs
 ynh_script_progression --message="Restoring the PostgresSql database..." --weight=20
 
 ynh_psql_test_if_first_run
-ynh_print_OFF
-db_pwd=$(ynh_app_setting_get --app=$app --key=db_password)
+db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
 # TODO: should I let these operation be logged?
 ynh_psql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
 ynh_psql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
-ynh_print_ON
 
 #=================================================
 # RESTORE VARIOUS FILES
@@ -114,8 +114,9 @@ ynh_script_progression --message="Restoring the systemd configuration..." --weig
 
 ynh_restore_file --origin_path="/etc/systemd/system/$app.service"
 systemctl enable $app.service --quiet
-setup_run_script_rights
 
+chmod 750 "$final_path/run.sh"
+chown "$app:$app" "$final_path/run.sh"
 
 #=================================================
 # INTEGRATE SERVICE IN YUNOHOST
diff --git a/scripts/upgrade b/scripts/upgrade
index 5d1b67d..3284ae6 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -24,9 +24,7 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 language=$(ynh_app_setting_get --app=$app --key=language)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 db_user=$db_name
-ynh_print_OFF
-db_password=$(ynh_app_setting_get --app=$app --key=db_password)
-ynh_print_ON
+db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
 synapse_instance=$(ynh_app_setting_get --app=$app --key=synapse_instance)
 log_path=$(ynh_app_setting_get --app=$app --key=log_path)
 etc_path=$(ynh_app_setting_get --app=$app --key=etc_path)
@@ -115,7 +113,9 @@ then
 	ynh_setup_source --dest_dir="$final_path"
 fi
 
-setup_final_path_rights
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:$app "$final_path"
 
 #=================================================
 # UPGRADE DEPENDENCIES
@@ -131,7 +131,10 @@ ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
 
 ynh_script_progression --message="Building Node dependencies..." --weight=3
 
-install_node_deps
+pushd "$final_path"
+  ynh_use_nodejs
+  ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH npm install
+popd
 
 #=================================================
 # SPECIFIC UPGRADE
@@ -167,7 +170,9 @@ ynh_script_progression --message="Integrating service in YunoHost..." --weight=1
 
 # Create startup script
 ynh_add_config --template="../sources/extra_files/app/run.sh" --destination="$final_path/run.sh"
-setup_run_script_rights
+
+chmod 750 "$final_path/run.sh"
+chown "$app:$app" "$final_path/run.sh"
 
 yunohost service add $app --description "$app daemon for bridging Discord and Matrix messages"
 
@@ -181,7 +186,11 @@ ynh_systemd_action --service_name=$app --action="start"
 #=================================================
 # REGISTER MODULE IN SYNAPSE
 #=================================================
-run_registration
+
+pushd "$final_path"
+    ynh_exec_warn_less sudo -u $app env $ynh_node_load_PATH NODE_ENV=production $final_path/run.sh -r -f "$app.yaml"
+popd
+
 cp "$final_path/$app.yaml" $app_service_registration_path/$app.yaml
 /opt/yunohost/matrix-$synapse_instance/update_synapse_for_appservice.sh \
     || ynh_die "Synapse can't restart with the appservice configuration"