Function generateShortIds

generateShortIds(
    length?: number,
    prefix?: string,
    count: number,
): Promise<string[]>
Generates a set of unique IDs under the same behavior as generateShortId.
Parameters
- length: number = DEFAULT_SHORT_ID_LENGTH
  The length of the ID to be generated. Default is 18.
- prefix: string = ''
  The prefix of the generated ID. Default is an empty string.
- count: number
  The number of IDs to be generated.
Returns Promise<string[]>