Feature/272 fix problems subgroup 3

[Ignarrman]

Rama duplicada por el bug del Visual Studio Code. Contiene el fix de los errores de Codacy tanto míos como de @JesusSolisOrtega y @Ignaciocefis debido a problemas con git y técnicos con el ordenador en el segundo caso.

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
:white_check_mark: +0.37% (target: -1.00%)	:white_check_mark: 80.00%

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (533937e2c7769d69bf1d5bbb992b0aa5bddeb204) | 1623 | 1264 | 77.88% | | | Head commit (0f09d4b6c4369f6e2dcf1fe864b98ebec3b1b4aa) | 1660 (+37) | 1299 (+35) | 78.25% (**+0.37%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#279) | 5 | 4 | **80.00%** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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[tcabgom]

Cabe destacar tambien que le hemos pedido al Codacy que ignore 2 issues.

• The password on 'self.user' is being set without validating the password: La contraseña SÍ se está validando, 2 veces de hecho, pero como el validador está creado por nosotros Codacy no lo detecta.
• Possible hardcoded password: '': Aquí se esta cambiando el campo de contraseña a nulo antes de mandárselo al usuario para que este, al recibir los datos de la aplicación, no reciba la contraseña. Como dicho cambio no se guarda en la base de datos, no afecta al funcionamiento del sistema, y no es ninguna vulnerabilidad.