Developer Function: Server Script: utilities.ConvertToBase64String
## Overview
Convert the string passed as an argument to the "Server Script" into a Base64 format string.
## Supported Versions
1. Pleasanter 1.3.9.0 or later
## Syntax
```
utilities.ConvertToBase64String(str, encoding)
```
## Parameter
|Parameter|Type|Required|Overview|
|:----------|:----------|:---:|:---------------------------|
|str|string|Yes|String to convert|
|encoding|string|No|Specify the [string encoding](https://learn.microsoft.com/en-us/dotnet/api/system.text.encoding?view=net-9.0&viewFallbackFrom=net-6.0)%20(%27utf-8%27%20is%20specified%20if%20omitted) ('utf-8' is specified if omitted.)|
## Return Value
Base64 format text string
## Usage Example
The following example converts the string "Pleasanter" to a Base64 format string and outputs it to the log.
##### JavaScript
```
let base64 = utilities.ConvertToBase64String('Pleasanter', 'shift_jis');
context.Log(base64);
```
## Notes
This is a method used in "「Server Script」". It cannot be used in "「Script」".
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