How does the code generation work?

I tried to update the API specification for the projected energy generation. However I couldn't get the generator to work. For local use, I should specify the template, but I couldn't find the template files anywhere. The generator itself later fails, see output below. Is there a documentation available on how to run the generator for this project?
```
java -jar openapi-generator-cli-6.2.1.jar generate -g python -i generator_config.yaml
[main] ERROR i.s.parser.SwaggerCompatConverter - failed to read resource listing
com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'templateDir': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')
at [Source: (String)"templateDir: ./local/deutschland_templates
additionalProperties:
packageName: "smard"
infoName: "BundesAPI"
infoEmail: "kontakt@bund.dev"
packageVersion: 0.1.0
packageUrl: "https://github.com/bundesAPI/smard-api"
namespace: "deutschland"
docLanguage: "de"
gitHost: "github.com"
gitUserId: "bundesAPI"
gitRepoId: "smard"
files:
pyproject.mustache:
destinationFilename: pyproject.toml
templateType: SupportingFiles
requirements.txt: {}
create_doc.mustache:
destinationFi"[truncated 262 chars]; line: 1, column: 12]
at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:2391)
at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:745)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._reportInvalidToken(ReaderBasedJsonParser.java:2961)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._reportInvalidToken(ReaderBasedJsonParser.java:2939)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._matchToken(ReaderBasedJsonParser.java:2713)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._matchTrue(ReaderBasedJsonParser.java:2667)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.nextToken(ReaderBasedJsonParser.java:767)
at com.fasterxml.jackson.databind.ObjectMapper._readTreeAndClose(ObjectMapper.java:4703)
at com.fasterxml.jackson.databind.ObjectMapper.readTree(ObjectMapper.java:3076)
at io.swagger.parser.SwaggerCompatConverter.readResourceListing(SwaggerCompatConverter.java:209)
at io.swagger.parser.SwaggerCompatConverter.read(SwaggerCompatConverter.java:122)
at io.swagger.parser.SwaggerCompatConverter.readWithInfo(SwaggerCompatConverter.java:93)
at io.swagger.parser.SwaggerParser.readWithInfo(SwaggerParser.java:45)
at io.swagger.v3.parser.converter.SwaggerConverter.readLocation(SwaggerConverter.java:83)
at io.swagger.parser.OpenAPIParser.readLocation(OpenAPIParser.java:16)
at org.openapitools.codegen.config.CodegenConfigurator.toContext(CodegenConfigurator.java:573)
at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:631)
at org.openapitools.codegen.cmd.Generate.execute(Generate.java:457)
at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:66)
[main] ERROR i.s.parser.SwaggerCompatConverter - failed to read resource listing
com.fasterxml.jackson.core.JsonParseException: Unrecognized token 'templateDir': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')
at [Source: (String)"templateDir: ./local/deutschland_templates
additionalProperties:
packageName: "smard"
infoName: "BundesAPI"
infoEmail: "kontakt@bund.dev"
packageVersion: 0.1.0
packageUrl: "https://github.com/bundesAPI/smard-api"
namespace: "deutschland"
docLanguage: "de"
gitHost: "github.com"
gitUserId: "bundesAPI"
gitRepoId: "smard"
files:
pyproject.mustache:
destinationFilename: pyproject.toml
templateType: SupportingFiles
requirements.txt: {}
create_doc.mustache:
destinationFi"[truncated 262 chars]; line: 1, column: 12]
at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:2391)
at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:745)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._reportInvalidToken(ReaderBasedJsonParser.java:2961)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._reportInvalidToken(ReaderBasedJsonParser.java:2939)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._matchToken(ReaderBasedJsonParser.java:2713)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._matchTrue(ReaderBasedJsonParser.java:2667)
at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.nextToken(ReaderBasedJsonParser.java:767)
at com.fasterxml.jackson.databind.ObjectMapper._readTreeAndClose(ObjectMapper.java:4703)
at com.fasterxml.jackson.databind.ObjectMapper.readTree(ObjectMapper.java:3076)
at io.swagger.parser.SwaggerCompatConverter.readResourceListing(SwaggerCompatConverter.java:209)
at io.swagger.parser.SwaggerCompatConverter.read(SwaggerCompatConverter.java:122)
at io.swagger.parser.SwaggerCompatConverter.readWithInfo(SwaggerCompatConverter.java:93)
at io.swagger.parser.SwaggerParser.readWithInfo(SwaggerParser.java:45)
at io.swagger.v3.parser.converter.SwaggerConverter.readLocation(SwaggerConverter.java:83)
at io.swagger.parser.OpenAPIParser.readLocation(OpenAPIParser.java:16)
at org.openapitools.codegen.config.CodegenConfigurator.toContext(CodegenConfigurator.java:573)
at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:631)
at org.openapitools.codegen.cmd.Generate.execute(Generate.java:457)
at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:66)
Exception in thread "main" org.openapitools.codegen.SpecValidationException: There were issues with the specification. The option can be disabled via validateSpec (Maven/Gradle) or --skip-validate-spec (CLI).
| Error count: 9, Warning count: 0
Errors:
-attribute paths is missing
-attribute additionalProperties is unexpected
-attribute swagger is missing
-attribute gitRepoId is unexpected
-attribute templateDir is unexpected
-attribute gitUserId is unexpected
-attribute files is unexpected
-attribute gitHost is unexpected
-attribute info is missing

at org.openapitools.codegen.config.CodegenConfigurator.toContext(CodegenConfigurator.java:604)
at org.openapitools.codegen.config.CodegenConfigurator.toClientOptInput(CodegenConfigurator.java:631)
at org.openapitools.codegen.cmd.Generate.execute(Generate.java:457)
at org.openapitools.codegen.cmd.OpenApiGeneratorCommand.run(OpenApiGeneratorCommand.java:32)
at org.openapitools.codegen.OpenAPIGenerator.main(OpenAPIGenerator.java:66)
```