# How to automatically set a Bearer Token for your Postman requests

### 1. Create `access_token` variables
i. Click `Manage Environments` on the right side of postman application.

ii. Add new environment and insert `access_token` keyword under `VARIABLE` field only.

### 2. Create Authentication API
i.  Insert `your oauth url` with `POST` method.

ii. Click Headers tab and set the key parameter (depends on your):-
    ```
    Content-Type : application/x-www-form-urlencoded
    ```
    ```
    Authorization : Basic <<secret>>
    ```

iii. Click Body tab and set the key parameter:-
    ```
    grant_type : password
    ```
    ```
    username : <<secret>>
    ```
    ```
    password : <<secret>>
    ```

iv. Select the environment name that we create in `Step 1`.

### 3. Create Tests script
i. Click `Tests` tab and put this code:-
```
var data = pm.response.json();
pm.environment.set("access_token", data.access_token);
```

### 4. Create a new API
i. Select the environment name that we create in `Step 1`.

ii. Insert the API URL and the method.

iii. make sure the API already save in postman.

iii. Click Headers tab and set the key parameter:-

```
Authorization: Bearer {{access_token}} // Choose the variable name we create in Step 1
``` `