### Basic Authentication Header Example

Source: https://ksefapi.pl/rest-ksef-api-dokumentacja

This example demonstrates how to construct the Authorization header for Basic Authentication using an API key ID and key.

```APIDOC
## Basic Authentication

### Description
This section details how to authenticate API requests using Basic Authentication. It involves encoding a string composed of your API key ID and API key using Base64 and including it in the `Authorization` header.

### Method
HTTP Authentication: Basic Authentication

### Header Construction
1. **Input String**: Concatenate your `key_id` and `key` with a colon in between: `key_id:key`.
2. **Base64 Encoding**: Encode the resulting string using Base64.
3. **Authorization Header**: Prepend `Basic ` to the Base64 encoded string and set it as the value for the `Authorization` header.

### Example

**Given:**
- `key_id` = `test_id`
- `key` = `test_key`

**Input String:**
```
test_id:test_key
```

**Base64 Encoded String:**
```
dGVzdF9pZDp0ZXN0X2tleQ==
```

**Authorization Header:**
```
Authorization: Basic dGVzdF9pZDp0ZXN0X2tleQ==
```
```

--------------------------------

### Basic Authentication Header Example

Source: https://ksefapi.pl/rest-ksef-api-dokumentacja

This example demonstrates how to construct the Authorization header for Basic Authentication using your API key ID and key. The input string 'key_id:key' is Base64 encoded.

```text
Authorization: Basic dGVzdF9pZDp0ZXN0X2tleQ==
```

--------------------------------

### Generate Invoice Request URL

Source: https://ksefapi.pl/rest-ksef-api-dokumentacja

This URL can be used in a web browser to test invoice generation. Replace `test_id` and `test_key` with your actual API credentials. Ensure you have a valid KSeF Client Token.

```text
https://test_id:test_key@www.ksefapi.pl/api-test/invoice/generate
```

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