Function getStringFromEnv

getStringFromEnv(options: GetStringFromEnvOptions): string
Get a string from the environment variables.
Parameters
- options: GetStringFromEnvOptions
  The options for getting the string.
  - OptionaldefaultValue?: string
    Optional default value to return if the environment variable is not set.
    
    Default
    ""
  - OptionalerrorMessage?: string
    Optional error message to throw if the environment variable is not set and no default value is provided.
    
    Default
    "Environment variable <key> is required"
  - key: string
    The key of the environment variable.
Returns string
Example
```
import { getStringFromEnv } from '@aws-lambda-powertools/commons/utils/env';

const myEnvVar = getStringFromEnv({
  key: 'MY_ENV_VAR',
  errorMessage: 'MY_ENV_VAR is required for this function',
});
```
By default, the value is trimmed and always required.

You can also provide a default value, which will be returned if the environment variable is not set instead of throwing an error.
Example
```
import { getStringFromEnv } from '@aws-lambda-powertools/commons/utils/env';

const myEnvVar = getStringFromEnv({
  key: 'MY_ENV_VAR',
  defaultValue: 'defaultValue',
});
```
- Defined in envUtils.ts:44