get_api_key: Find API Key for Elsevier

Description

Determines if option(elsevier_api_key) or option(elsevier_api_key_filename) is set. If not, it stops and returns an error. If so, returns the value.

Usage

get_api_key(api_key = NULL, error = TRUE)

Arguments

api_key

Elsvier API key

error

Should the function error if api_key = NULL?

Value

API key

Examples

Run this code

get_api_key(error = FALSE)

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