First visualize the sampling distribution of the permuted statistics indicating the place where obs_stat = diff_orig, and coloring in values below with the command direction = "less".
Then get_p_value is calculated as the proportion of permuted statistics which are direction = "less" than obs_stat = diff_orig.
As an alternative way to calculate the p-value, use summarize() and mean() to find the proportion of times the permuted differences in opp_perm (called stat) are less than or equal to the observed difference (called diff_orig).
You can test your knowledge by trying out: direction = "greater", direction = "two_sided", and direction = "less" before submitting your answer to both visualize and get_p_value.

Errors and their consequences