Method could be a function

### [Codacy](https://app.codacy.com/gh/BuildForSDG/team-272-SMES-Server/commit?cid=469587798) detected an issue:
#### Message: `Method could be a function`

#### Occurred on:
+ **Commit**: b3ff0019795419a392647e530bc5f7651d3a0fd8
+ **File**: [funder/serializers.py](https://github.com/BuildForSDG/team-272-SMES-Server/blob/b3ff0019795419a392647e530bc5f7651d3a0fd8/funder/serializers.py)
+ **LineNum**: [15](https://github.com/BuildForSDG/team-272-SMES-Server/blob/b3ff0019795419a392647e530bc5f7651d3a0fd8/funder/serializers.py#L15)
+ **Code**: `def create(self, validated_data):`

#### Currently on:
+ **Commit**: 8f6fa99e6d0a77f76cbc85b03106c0442fe4d105
+ **File**: [funder/serializers.py](https://github.com/BuildForSDG/team-272-SMES-Server/blob/8f6fa99e6d0a77f76cbc85b03106c0442fe4d105/funder/serializers.py)
+ **LineNum**: [13](https://github.com/BuildForSDG/team-272-SMES-Server/blob/8f6fa99e6d0a77f76cbc85b03106c0442fe4d105/funder/serializers.py#L13)

Start in funder/serializers.py at the create method on the indicated line, then inspect the surrounding serializer and its callers to understand whether instance state is needed. Confirm the change with the project's available checks and ensure the Codacy “Method could be a function” finding is resolved.

Written by the indexing model from the issue text.