Process sets the value of the struct fields from the associated environment variables.

ProcessAndValidate sets the value of the struct fields from the associated environment variables.

WithPrefix sets the prefix to look for in the environment variables.

DefaultTag is the default to use in case there is no environment variable that matches the formatted field name.

FormatTag is the field name pre-processor.

FormatTypeSnake tells the processor to transform the field name into snake-case.

Option is used to set parameters for the environment variable processor.