Add more tests to improve test coverage

[waddaboo]

Description

Based on the current run of yarn test:coverage, more tests can be added to improve the overall test coverage.

Progress are as below:

Files	Before	After
apps/api/src/app/credentials	93.57%	99.08%
apps/api/src/app/groups	94.51%	98.73%
libs/credentials/src	94.8%	98.7%
libs/utils/src	83.33%	100%

Related Issue

Closes #535

Does this introduce a breaking change?

• Yes
• No

Other information

Some files unable to get 100% coverage due to unreachable error.

Example:

bandada/apps/api/src/app/groups/groups.service.ts

Lines 251 to 256 in a1062b4

	const group = await this.getGroup(groupId)
	if (!group)
	throw new BadRequestException(
	`The group '${groupId}' does not exists`
	)

getGroup already has a check for existing group and will throw an error if the group does not exist. Hence, the code is unable to reach the BadRequestException if the group does not exist.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
bandada-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 4, 2024 8:36am
bandada-website	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 4, 2024 8:36am

[vplasencia]

Great work @waddaboo 🚀