# FAQ
## How to create a user
After running doccano webserver, login to the admin site(in the case of pip installation) via . The below is the example of port `8000` and username `admin`. If you set your own port or username and password on running the server, please change to your one.
After login to the admin site, select `Users`:
Select the ADD USER button in the upper right corner:
After entering the username and password for the new user, select the `SAVE` button:
Congratulations. Now you are able to log in to doccano as a new user. After logging out of the admin site, try logging in as a new user.
## How to add a user to your project
Note: This step assumes you have already created a new user. See [How to create a user](#how-to-create-a-user) in detail.
After logging in to doccano, select your project. Note that you must be the administrator of the project to add users to the project.
Select `Members` from the left side menu. If you are not the administrator of the project, `Members` will not be displayed.
Select the `Add` button to display the form. Fill in this form with the user name and role you want to add to the project. Then, select the `Save` button.
Congratulations. Now the new user are able to access the project.
## How to change the password
After running doccano webserver, login to the admin site(in the case of pip installation) via . Note that you need to have a staff permission to login to the admin site. If you don't have it, please ask the administrator to change your password.
After login to the admin site, select `Users`:
Select the user you want to change the password:
Click `this form` link:
After showing a form below, change password there:
## I can't upload my data
Please check the following list.
- File encoding: `UTF-8` is appropriate.
- Filename: alphabetic file name is suitable.
- File format selection: File format radio button should be selected properly.
- When you are using JSON/JSONL: Confirm JSON data is valid.
- You can use [JSONLint](https://jsonlint.com/) or some other tool (when JSONL, pick one data and check it).
- When you are using CSV: Confirm CSV data is valid.
- You can use Excel or some tools that have import CSV feature.
- Lack of line: Data file should not contain blank line.
- Lack of field: Data file should not contain blank field.
**You don't need your real & all data to validate file format. The picked data & masked data is suitable if your data is large or secret.**
## I want to change port number
On production, edit `docker-compose.prod.yml` file: change `80:80` substring in `nginx`/`ports` section to `:80`.
On development, edit `docker-compose.dev.yml` file: change `8000:8000` substring in `backend`/`ports` section to `:8000`.
## I want to update to the latest doccano image
1. Execute `git pull` to reflect the latest doccano.
2. Delete the volume that `doccano_node_modules`, `doccano_static_volume`, `doccano_venv` and `doccano_www`.
**Do not delete `doccano_postgres_data` because it stores your projects data.**
3. Rebuild the doccano image.
The following commands are the procedure for 2~3.
```
❯ docker volume ls
DRIVER VOLUME NAME
local doccano_node_modules
local doccano_postgres_data
local doccano_static_volume
local doccano_venv
local doccano_www
❯ docker volume rm doccano_node_modules doccano_static_volume doccano_venv doccano_www
❯ docker-compose -f docker-compose.prod.yml build --no-cache
```