Update paperless-ngx-install.sh

fix paperless-ngx incorrect user:pass https://github.com/tteck/Proxmox/issues/1376

install/paperless-ngx-install.sh

@@ -94,7 +94,7 @@ msg_ok "Installed Natural Language Toolkit"
 
 msg_info "Setting up database"
 DB_USER=paperless
-DB_PASS="$(head /dev/urandom | tr -dc A-Za-z0-9 | head -c 13)"
+DB_PASS="$(openssl rand -base64 18 | cut -c1-13)"
 DB_NAME=paperlessdb
 $STD sudo -u postgres psql -c "CREATE ROLE $DB_USER WITH LOGIN PASSWORD '$DB_PASS';"
 $STD sudo -u postgres psql -c "CREATE DATABASE $DB_NAME WITH OWNER $DB_USER TEMPLATE template0;"
@@ -118,7 +118,6 @@ msg_info "Setting up admin Paperless-ngx User & Password"
 cat <<EOF | python3 /opt/paperless/src/manage.py shell
 from django.contrib.auth import get_user_model
 UserModel = get_user_model()
-if len(UserModel.objects.all()) == 1:
 user = UserModel.objects.create_user('admin', password='$DB_PASS')
 user.is_superuser = True
 user.is_staff = True